Tracking: Add Azure Linux for build and test

[richlander]

We are missing Azure Linux in a few spots. This issue is intended to track that.

• Switch 8.0 build images to Azure Linux 3.0 #106170
• Add Azure 3.0 helix test #106330
• Add helix test for 8.0 (after 9.0 PR merges)
• Add helix test to dotnet/aspnetcore
• Missing 8.0 build images (Azure Linux 3.0) dotnet-buildtools-prereqs-docker#1173
• Create list of missing 9.0 helix images

@sbomer

[am11]

For FreeBSD, I think we can drop 13 and switch pipeline to use 14; since it's only used for build validation and having one version should be enough for community-platform. 14 is the version dotnet package maintainers are using downstream. cc @Thefrank

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[Thefrank]

@am11 14.x should be fine. There was a patch submitted a few months ago to fix build errors on 14. Since then I have not encountered compile issues with dotNET and FreeBSD 14