Rename TelemetryResilienceStrategyOptions to TelemetryOptions

[martintmk]

Details on the issue fix or feature implementation

The original name is too wordy and it's already in Polly.Extensions.Telemetry namespace.

Contributes to #1301

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

Merging #1318 (637bd21) into main (488bc10) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1318   +/-   ##
=======================================
  Coverage   83.29%   83.29%           
=======================================
  Files         264      264           
  Lines        6305     6305           
  Branches      997      997           
=======================================
  Hits         5252     5252           
  Misses        844      844           
  Partials      209      209           

Flag	Coverage Δ
linux	83.29% <100.00%> (ø)
macos	?
windows	83.29% <100.00%> (ø)

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Impacted Files	Coverage Δ
...rc/Polly.Extensions/Telemetry/EnrichmentContext.cs	100.00% <ø> (ø)
src/Polly.Extensions/Telemetry/TelemetryOptions.cs	100.00% <ø> (ø)
...dencyInjection/PollyServiceCollectionExtensions.cs	100.00% <100.00%> (ø)
...s/Telemetry/ResilienceTelemetryDiagnosticSource.cs	100.00% <100.00%> (ø)
...ry/TelemetryResilienceStrategyBuilderExtensions.cs	100.00% <100.00%> (ø)