ci: Add --test_verbose_timeout_warnings

[phlax]

Its not clear what this flag does - the docs say it outputs warnings about "tests that are too big"

currently we get such warnings without any useful info, just advice to add this flag

in my testing adding this flag does nothing other than make the warnings go away - seems worth adding

Commit Message:
Additional Description:
Risk Level:
Testing:
Docs Changes:
Release Notes:
Platform Specific Features:
[Optional Runtime guard:]
[Optional Fixes #Issue]
[Optional Fixes commit #PR or SHA]
[Optional Deprecated:]
[Optional API Considerations:]

[phlax]

reading here https://docs.aspect.build/tutorial-paywall/testing/#the-encyclopedia and iiuc the default test size is "moderate" and this should tell you that tests that can run quickly dont need that

[phlax]

my reading of bazelbuild/bazel#13103 is that this flag may not work correctly

its kinda nice not getting the useless warnings about the useless warning flag, but it would be good to get a read on which tests are "too big"

[phlax]

i tried testing this with various --test_output settings which made no difference, afaict this flag does the ~opposite of what it says, but maybe im missing something

[keith]

//:foo                                                                   PASSED in 5.1s
  WARNING: //:foo: Test execution time (5.1s excluding execution overhead) outside of range for LONG tests. Consider setting timeout="short" or size="small".

here's an example of this warning. in this case i made foo large

[phlax]

i see - i saw similar in posted logs, but didnt seem to get this in any of the tests (which otherwise emit the warning about the warning flag)

either way, i reckon this change should be good