Refactor telemetry & exporter setup: deprecations, noise reduction, and API updates

[RohitRanjanMS]

• Replaced deprecated RecordException with AddException.
• Added support for implementationFactory in ServiceMatch to handle AzMon exporter live metrics service registration.
• Updated to new UseOtlpExporter() and UseAzureMonitorExporter() APIs — now auto‑configures trace, metrics, logging, and log streaming.
• Reduced telemetry noise by:
• Using targeted source names instead of wildcard Azure.*.
• Filtering out localhost‑originated request telemetry.
• Removed obsolete reflection‑based tests that no longer work with newer package versions.

resolves #10666

Pull request checklist

IMPORTANT: Currently, changes must be backported to the in-proc branch to be included in Core Tools and non-Flex deployments.

• Backporting to the in-proc branch is not required
  • Otherwise: Link to backporting PR
• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• My changes do not require diagnostic events changes
  • Otherwise: I have added/updated all related diagnostic events and their documentation (Documentation issue linked to PR)
• I have added all required tests (Unit tests, E2E tests)

[Copilot]

Pull Request Overview

This PR refactors the OpenTelemetry configuration to modernize APIs, reduce telemetry noise, and improve reliability by replacing deprecated methods and removing brittle reflection-based tests.

• Replaced deprecated RecordException with AddException for activity exception logging
• Updated to new UseOtlpExporter() and UseAzureMonitorExporter() APIs that auto-configure all telemetry types
• Reduced telemetry noise by using targeted Azure source names and filtering localhost requests

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
OpenTelemetryConfigurationExtensions.cs	Updated to new exporter APIs, restructured configuration methods, added localhost filtering
ServiceMatch.cs	Added support for implementationFactory in service matching logic
DependencyValidator.cs	Updated external service registrations for new telemetry services
GrpcWorkerChannel.cs	Replaced deprecated RecordException with AddException
OpenTelemetryConfigurationExtensionsTests.cs	Removed reflection-based tests and simplified test configuration
release_notes.md	Added entry for telemetry refactoring changes

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[brettsam]

small api comment