Port conditional test selection changes to main

[radical]

Description

Ports the conditional test selection work from conditional-test-selection-unified-rules-design onto main as a squashed change.

This brings over the workflow updates, selector tooling, Infrastructure coverage, and supporting docs as a single forward port so the branch-only work can be reviewed against current main without replaying the original merge-heavy history.

Validation performed:

• ./restore.sh
• ./dotnet.sh build tools/TestSelector/TestSelector.csproj -c Release --nologo
• ./dotnet.sh build tools/Aspire.TestSelector/Aspire.TestSelector.csproj -c Release --nologo
• ./dotnet.sh build tools/GenerateTestSummary/GenerateTestSummary.csproj -c Release --nologo
• ./dotnet.sh build tests/Aspire.Cli.EndToEnd.Tests/Aspire.Cli.EndToEnd.Tests.csproj -c Release --nologo
• ./dotnet.sh build tests/Aspire.EndToEnd.Tests/Aspire.EndToEnd.Tests.csproj -c Release --nologo
• ./dotnet.sh build tests/Aspire.Templates.Tests/Aspire.Templates.Tests.csproj -c Release --nologo
• ./dotnet.sh test tests/Infrastructure.Tests/Infrastructure.Tests.csproj -c Release -- --filter-namespace "*TestSelector*" --filter-namespace "*.PowerShellScripts" --filter-namespace "*.ConditionalSelection" --filter-not-trait "quarantined=true" --filter-not-trait "outerloop=true"

Fixes # (issue)

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Link to aspire.dev issue:
      • New issue
  • No

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 15742

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/microsoft/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 15742"