chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-java to 2.18.1 (#967)

* chore(deps): upgrade gapic-generator-java to 2.8.0 and update gax-java to 2.18.1

PiperOrigin-RevId: 450543911

Source-Link: googleapis/googleapis@5528344

Source-Link: https://github.com/googleapis/googleapis-gen/commit/9f6775cab1958982b88967a43e5e806af0f135db
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/ConfigClient.java

@@ -18,7 +18,6 @@
 
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.longrunning.OperationFuture;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
@@ -181,7 +180,6 @@ public static final ConfigClient create(ConfigSettings settings) throws IOExcept
    * Constructs an instance of ConfigClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(ConfigSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final ConfigClient create(ConfigServiceV2Stub stub) {
     return new ConfigClient(stub);
   }
@@ -196,7 +194,6 @@ protected ConfigClient(ConfigSettings settings) throws IOException {
     this.operationsClient = OperationsClient.create(this.stub.getOperationsStub());
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected ConfigClient(ConfigServiceV2Stub stub) {
     this.settings = null;
     this.stub = stub;
@@ -207,7 +204,6 @@ public final ConfigSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public ConfigServiceV2Stub getStub() {
     return stub;
   }

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/LoggingClient.java

@@ -20,7 +20,6 @@
 import com.google.api.MonitoredResourceDescriptor;
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
 import com.google.api.gax.paging.AbstractPage;
@@ -142,7 +141,6 @@ public static final LoggingClient create(LoggingSettings settings) throws IOExce
    * Constructs an instance of LoggingClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(LoggingSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final LoggingClient create(LoggingServiceV2Stub stub) {
     return new LoggingClient(stub);
   }
@@ -156,7 +154,6 @@ protected LoggingClient(LoggingSettings settings) throws IOException {
     this.stub = ((LoggingServiceV2StubSettings) settings.getStubSettings()).createStub();
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected LoggingClient(LoggingServiceV2Stub stub) {
     this.settings = null;
     this.stub = stub;
@@ -166,7 +163,6 @@ public final LoggingSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public LoggingServiceV2Stub getStub() {
     return stub;
   }

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/MetricsClient.java

@@ -18,7 +18,6 @@
 
 import com.google.api.core.ApiFuture;
 import com.google.api.core.ApiFutures;
-import com.google.api.core.BetaApi;
 import com.google.api.gax.core.BackgroundResource;
 import com.google.api.gax.paging.AbstractFixedSizeCollection;
 import com.google.api.gax.paging.AbstractPage;
@@ -130,7 +129,6 @@ public static final MetricsClient create(MetricsSettings settings) throws IOExce
    * Constructs an instance of MetricsClient, using the given stub for making calls. This is for
    * advanced usage - prefer using create(MetricsSettings).
    */
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public static final MetricsClient create(MetricsServiceV2Stub stub) {
     return new MetricsClient(stub);
   }
@@ -144,7 +142,6 @@ protected MetricsClient(MetricsSettings settings) throws IOException {
     this.stub = ((MetricsServiceV2StubSettings) settings.getStubSettings()).createStub();
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   protected MetricsClient(MetricsServiceV2Stub stub) {
     this.settings = null;
     this.stub = stub;
@@ -154,7 +151,6 @@ public final MetricsSettings getSettings() {
     return settings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public MetricsServiceV2Stub getStub() {
     return stub;
   }

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/stub/ConfigServiceV2StubSettings.java

@@ -533,7 +533,6 @@ public UnaryCallSettings<CopyLogEntriesRequest, Operation> copyLogEntriesSetting
     return copyLogEntriesOperationSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public ConfigServiceV2Stub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/stub/LoggingServiceV2StubSettings.java

@@ -424,7 +424,6 @@ public UnaryCallSettings<DeleteLogRequest, Empty> deleteLogSettings() {
     return tailLogEntriesSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public LoggingServiceV2Stub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()

google-cloud-logging/src/main/java/com/google/cloud/logging/v2/stub/MetricsServiceV2StubSettings.java

@@ -192,7 +192,6 @@ public UnaryCallSettings<DeleteLogMetricRequest, Empty> deleteLogMetricSettings(
     return deleteLogMetricSettings;
   }
 
-  @BetaApi("A restructuring of stub classes is planned, so this may break in the future")
   public MetricsServiceV2Stub createStub() throws IOException {
     if (getTransportChannelProvider()
         .getTransportName()