Bump .NET 11 SDK pin to 11.0.100-preview.5.26302.115

[glen-84]

Summary

• Bumps the pinned .NET 11 SDK from preview.4.26230.115 to preview.5.26302.115 in global.json and every workflow that installs the SDK (release, ci, coverage, benchmarks).
• Picks up the NativeAOT IL-scanner fix from Make IL Scanner report both variants dotnet/runtime#128107: with runtime-async enabled, the preview 4 ILC fails the Nitro CLI AOT publish with VTable … not computed by the IL scanner. Preview 5 resolves it.
• All NuGet package versions stay on the existing 11.0.0-preview.4 band (no Directory.Packages.props changes), since the Npgsql EF provider has no preview 5 release yet.

Test plan

• Nitro CLI NativeAOT publish (PublishAot, net11.0): fails on preview 4, succeeds on preview 5 (produces a working binary).
• PostgreSQL integration tests (EF Core + Npgsql held at preview 4) on the preview 5 SDK/runtime: clean restore with no NuGet version conflicts, 40/40 tests pass.

[Copilot]

Pull request overview

This PR updates the repository’s pinned .NET 11 SDK to 11.0.100-preview.5.26302.115 to pick up the NativeAOT IL-scanner fix needed for Nitro CLI AOT publishing, while keeping existing NuGet package versions on the 11.0.0-preview.4 band.

Changes:

• Bump global.json SDK version from preview 4 to preview 5.
• Update GitHub Actions workflows (release, ci, coverage) to install the preview 5 SDK.
• Update the benchmarks workflow’s dotnet-install.sh version to preview 5.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
global.json	Updates the pinned .NET 11 SDK version to preview 5.
.github/workflows/release.yml	Uses preview 5 in setup-dotnet matrix and Nitro CLI build job.
.github/workflows/coverage.yml	Uses preview 5 in setup-dotnet matrix and coverage upload job.
.github/workflows/ci.yml	Uses preview 5 in setup-dotnet matrix and coverage merge job.
.github/workflows/benchmarks.yml	Updates dotnet-install.sh to request preview 5.

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[github-code-quality]

Code Coverage Overview

Languages: C#

C# / code-coverage/dotnet

The overall coverage in the gai/bump-sdk-net11-p... branch remains at 49%, unchanged from the main branch.

Show a code coverage summary of the most impacted files.

File	main f30a54f	gai/bump-sdk-net11-p... 1e38815	+/-
/home/runner/wo...gerMessage.g.cs	15%	11%	-4%
/home/runner/wo...geDispatcher.cs	75%	72%	-3%
/home/runner/wo...boxProcessor.cs	74%	72%	-2%
/home/runner/wo...eiveEndpoint.cs	72%	70%	-2%
/home/runner/wo...SocketClient.cs	78%	80%	+2%
/home/runner/wo...ueryExecutor.cs	65%	67%	+2%
/home/runner/wo...etConnection.cs	86%	88%	+2%
/home/runner/wo...dArrayWriter.cs	65%	68%	+3%
/home/runner/wo...toResetEvent.cs	68%	73%	+5%
/home/runner/wo...ageProcessor.cs	89%	100%	+11%

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