gh-141794: Reduce size of compiler stress tests to fix Android warnings

[mhsmith]

This fixes the Android low memory warnings in test_ast and test_compile, previously discussed in #137186 (comment).

These warnings haven't led to a crash so far. However, the warning will only appear during the first test that brings the memory below a threshold. If a later test exhausts the memory completely, then the warning won't appear again, and the process will simply crash. This separation between the warning and the crash makes the crash much more difficult to understand.

I think this may have been what happened in #142228 (comment), which introduced some leaks. Notice in this run, the warning appeared during test_ast, and the crash happened in test_random.

• Issue: Compiling executors can result in excessively large amounts of machine code. #141794

[mhsmith]

I've updated this to change the sizes only on Android, and the tests are now passing on all platforms, so this PR is ready to review.

Due to #142289, the tests are now running on API level 35, so the low memory warnings are much less detailed. Search for the scudo : Can't populate more pages warning in the most recent main branch test, and notice that the warning is not present in the log of this PR.

[miss-islington-app]

Thanks @mhsmith for the PR, and @Eclips4 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @mhsmith and @Eclips4, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker f193c8fe9e1d722c9a7f9a2b15f8f1b913755491 3.13 

[bedevere-app]

GH-142386 is a backport of this pull request to the 3.14 branch.

[bedevere-app]

GH-142409 is a backport of this pull request to the 3.13 branch.