Backport #92375 and #93082 to release/8.0-staging

[eduardo-vp]

This is part of the work to transition to the 1ES templates in servicing branches.

PR #92375 was cleanly cherry-picked, except for changes in eng/pipelines/coreclr/runtime-nativeaot-outerloop.yml which were discarded.

For PR #93082, only the changes in eng/pipelines/runtime*.yml were included as the others are not required.

Official build: https://dev.azure.com/dnceng/internal/_build/results?buildId=2442616&view=results

cc @jkoritzinsky @agocke @amanasifkhalid

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Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

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[agocke]

Probably not strictly necessary to backport new tests, but not a problem if it makes porting easier. This won’t work for net6 because Native aot wasn’t supported then.

[eduardo-vp]

Sounds good, thanks for letting me know. I'll make the PR simpler in that case, hoping that it can be directly backported to net6

[agocke]

Lgtm although we only strictly need to port changes to runtime-official and dependencies thereof. If possible I would try to avoid other changes that may change behavior for only the public build.

[jeffschwMSFT]

approved. we can take this as tell mode

cc @carlossanlop