Add scaling to [0, 100] for LinuxUtilizationProvider

[amadeuszl]

Fix #7124

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull request overview

This PR addresses #7124 by adding a Linux-specific option to emit CPU/memory utilization metrics either as ratios ([0,1]) or as percentage-like values ([0,100]) to support exporters that don’t handle fractional values well.

Changes:

• Added ResourceMonitoringOptions.UseZeroToOneRangeForLinuxMetrics (defaulting to [0,1] behavior).
• Updated LinuxUtilizationProvider to apply a configurable multiplier (1 or 100) to Linux CPU and memory utilization metric calculations.
• Added Linux utilization provider tests to validate the new scaling behavior (currently focused on memory utilization).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
test/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring.Tests/Linux/LinuxUtilizationProviderTests.cs	Adds tests for the new Linux scaling option (memory utilization assertions).
src/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring/ResourceMonitoringOptions.cs	Introduces the new Linux-specific scaling option with XML docs.
src/Libraries/Microsoft.Extensions.Diagnostics.ResourceMonitoring/Linux/LinuxUtilizationProvider.cs	Applies the scaling option to CPU/memory utilization metric calculations via a multiplier.

[amadeuszl]

For windows we have UseZeroToOneRangeForMetrics where it's false by default, It's a bit ugly, but that's where we are to not cause breaking changes.

We can make behavior breaking change and use only one option UseZeroToOneRangeForMetrics, set to true bu default. I think we even should make it before going to API review, as this state of things made not go through the review.