Revert "Disable GetGCMemoryInfo on arm (#73477)"

[noahfalk]

Fixes #73247

This reverts commit 9865cc7.
We believe the problematic change has been reverted so the test can be re-enabled.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[noahfalk]

@am11 @filipnavara @janvorli @jkoritzinsky @karelz

[noahfalk]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[noahfalk]

@karelz - as new test-monitor can I hand this PR over to you to decide whether or not to merge it? I think the PR that reverted the pinvoke inlining did its ARM validation before this test got disabled and passed so I am reasonably confident that issue is solved. This PR just gets the test turned on again and confirms everything is still in good shape.

[filipnavara]

Some of the pipelines unfortunately failed on the dotnet-install.sh script where HTML was received from the server instead of expected binary data...

[akoeplinger]

I retried the failing jobs, let's see.

[hoyosjs]

The Android JIT.Directed failures are tracked in #73539

[karelz]

@noahfalk sorry for late response, I didn't notice it until now.
I was a bit lost what reverted what and fixed what -- I updated the top post.