[release/7.0.1xx] Install libLLDB 9

[mmitche]

• Please add description for changes you are making.
• If there is an issue related to this PR, please add the reference.

[marcpopMSFT]

CC @dsplaisted

[dsplaisted]

Thanks a bunch. 🎉 Hope this works!

[marcpopMSFT]

So Matt's changes fixed the build but we have a couple of 1.1 tests that aren't supported on this platform. Is there a specific RID we can look out for here: https://github.com/dotnet/sdk/blob/main/src/Tests/Microsoft.NET.TestFramework/EnvironmentInfo.cs#L55 or is debian just a generic linux rid? If so, should we finally disable 1.1 tests in installer on the various linux platforms? We'll still have sdk repo coverage on unbuntu.

CC @dsplaisted

[marcpopMSFT]

Dug into the test code and confirmed that it's reporting debian.11-x64 for the rid. Here's the fix in installer for this as nothing below 2.1 is supported on debian: dotnet/sdk#32127. So we either merge all servicing on red for two months or we could disable these two tests on linux for two months.

[marcpopMSFT]

realized that we'd already disabled these two tests on linux in main so went ahead and cherry-picked that. We can undo that once my sdk PR is in if we like in two months.

[marcpopMSFT]

@mmitche ok, it's now failing to find package_tool.sh. As far as I can tell, that used to be included on the image by default and I'm not sure what component brought that in.