[Infra] Update to .NET 10 GA

[martincostello]

Changes

Update to stable release of .NET 10.

Opening now to be ready, but the CI will fail until .NET 10 GA is actually published and the Docker container digests are known.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.75%. Comparing base (893fb93) to head (aa0ded5).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6667      +/-   ##
==========================================
- Coverage   86.79%   86.75%   -0.05%     
==========================================
  Files         258      258              
  Lines       11958    11958              
==========================================
- Hits        10379    10374       -5     
- Misses       1579     1584       +5     

Flag	Coverage Δ
unittests-Project-Experimental	86.62% <ø> (-0.04%)	⬇️
unittests-Project-Stable	86.59% <ø> (-0.14%)	⬇️
unittests-Solution	86.74% <ø> (+0.01%)	⬆️
unittests-UnstableCoreLibraries-Experimental	86.07% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 2 files with indirect coverage changes

[Copilot]

Pull Request Overview

This PR updates the project from .NET 10 RC2 to the stable .NET 10 GA release. The changes systematically replace all RC2 version references with their GA equivalents.

• Updates .NET SDK version from 10.0.100-rc.2 to 10.0.100
• Updates all .NET 10 package versions from 10.0.0-rc.2.25502.107 to 10.0.0
• Updates Docker base images with GA versions and corresponding SHA256 digests

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
global.json	Updates SDK version to .NET 10 GA (10.0.100)
Directory.Packages.props	Updates all Microsoft.Extensions and System.Diagnostics.DiagnosticSource packages to .NET 10 GA versions (10.0.0)
test/OpenTelemetry.Instrumentation.W3cTraceContext.Tests/OpenTelemetry.Instrumentation.W3cTraceContext.Tests.csproj	Updates Microsoft.Extensions.DependencyInjection.Abstractions package reference to GA version
test/OpenTelemetry.Instrumentation.W3cTraceContext.Tests/Dockerfile	Updates .NET 10 SDK Docker image to GA with new SHA digest
test/OpenTelemetry.Exporter.OpenTelemetryProtocol.Tests/IntegrationTest/Dockerfile	Updates .NET 10 SDK Docker image to GA with new SHA digest
examples/MicroserviceExample/WorkerService/Dockerfile	Updates both .NET 10 SDK and ASP.NET Docker images to GA with new SHA digests
examples/MicroserviceExample/WebApi/Dockerfile	Updates both .NET 10 SDK and ASP.NET Docker images to GA with new SHA digests

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