[release/6.0.2xx-preview13] [CI] Ensure we have dotnet 3.x to be able to run ESRP.

[vs-mobiletools-engineering-service2]

This is needed to make the CI work

Backport of #14323

[vs-mobiletools-engineering-service2]

❌ [PR Build] Tests failed on Build ❌

Tests failed on Build.

• Azure DevOps
• Html Report (VSDrops) Download

API diff

✅ API Diff from stable

View API diff

• iOS vsdrops gist
• macOS vsdrops gist
• tvOS vsdrops gist
• watchOS vsdrops gist

View dotnet API diff

• dotnet-iOS vsdrops gist
• dotnet-macOS vsdrops gist
• dotnet-tvOS vsdrops gist
• dotnet-MacCatalyst vsdrops gist

View dotnet legacy API diff

• dotnet-legacy-iOS vsdrops gist
• dotnet-legacy-macOS vsdrops gist
• dotnet-legacy-tvOS vsdrops gist

View dotnet iOS-MacCatalayst API diff

• dotnet-macCatiOS vsdrops gist

API Current PR diff

ℹ️ API Diff (from PR only) (please review changes)

View API diff

• iOS vsdrops gist
• macOS vsdrops gist
• tvOS vsdrops gist
• watchOS vsdrops gist

View dotnet API diff

• dotnet-iOS vsdrops gist
• dotnet-macOS vsdrops gist
• dotnet-tvOS vsdrops gist
• dotnet-MacCatalyst vsdrops gist

View dotnet legacy API diff

• dotnet-legacy-iOS vsdrops gist
• dotnet-legacy-macOS vsdrops gist
• dotnet-legacy-tvOS vsdrops gist

View dotnet iOS-MacCatalayst API diff

• dotnet-macCatiOS vsdrops gist

Generator diff

✅ Generator Diff (no change)

GitHub pages

Results can be found in the following github pages (it might take some time to publish):

• Test results
• API diff
• API & Generator diff

Test results

6 tests failed, 99 tests passed.

Failed tests

• introspection/Mac Catalyst [dotnet]/Debug [dotnet]: Failed (Test run failed.
  Tests run: 44 Passed: 42 Inconclusive: 0 Failed: 1 Ignored: 1)
• monotouch-test/Mac [dotnet]/Debug [dotnet]: Failed (Test run failed.
  Tests run: 2629 Passed: 2542 Inconclusive: 6 Failed: 1 Ignored: 86)
• monotouch-test/Mac Catalyst [dotnet]/Debug [dotnet]: Failed (Test run failed.
  Tests run: 2767 Passed: 2649 Inconclusive: 10 Failed: 1 Ignored: 117)
• xammac tests/Mac Modern/Debug: Failed (Test run failed.
  Tests run: 2635 Passed: 2550 Inconclusive: 10 Failed: 2 Ignored: 83)
• xammac tests/Mac Modern/Release: Failed (Test run failed.
  Tests run: 2632 Passed: 2546 Inconclusive: 10 Failed: 2 Ignored: 84)
• xammac tests/Mac Modern/Release (all optimizations): Failed (Test run failed.
  Tests run: 2632 Passed: 2546 Inconclusive: 10 Failed: 1 Ignored: 85)

Pipeline on Agent XAMBOT-1042.Monterey
Merge 2dcc3d6 into b22e815

[dalexsoto]

Unrelated test failures #