[ric-oliv]

Throwaway draft to measure two changes on top of all 12 open CI PRs, the same base as #5802. I'll close it after three runs.

1. The MSBuild job builds the MAUI sample again. ci: build the app samples in their own job #5783 took the app samples out of the platform solution filters, so msbuild.exe stopped building any Android or Windows app. The MSBuild job ends about 19 minutes before the slowest leg, so it has room for it.
2. The win-arm64 integration tests run in their own job. On ci: measure all the open CI changes together (do not merge) #5802 the win-arm64 leg was the slowest check, at 30.1 to 31.6 minutes. Its 4 cores can't run the unit tests and the integration tests at the same time: Pester took 876.6 s next to the unit tests, against 684 s with them in the foreground, and the same 69 passed and 35 skipped. The macOS MAUI job from ci: run the macOS MAUI integration tests in their own job #5797 becomes a matrix with a win-arm64 entry, which builds and packs only the 5 packages the tests use, then runs every integration test file.

What I'm checking:

• The win-arm64 leg ends at about 19 minutes and the new win-arm64 job at 25 or less.
• The new job's Pester run still shows 69 passed and 35 skipped.
• The MSBuild job builds the MAUI sample and still ends well before the slowest check.

#skip-changelog

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.14%. Comparing base (b41b96c) to head (1f9ae9e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5803      +/-   ##
==========================================
+ Coverage   76.13%   76.14%   +0.01%     
==========================================
  Files         528      528              
  Lines       19579    19579              
  Branches     3829     3829              
==========================================
+ Hits        14906    14908       +2     
+ Misses       3791     3789       -2     
  Partials      882      882              

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