Revert "Split test_support_unittests into smaller targets"

This reverts commit 298f1ad91d80d433d7d1feac6430088eb4b47190.

Reason for revert: Missed some tests

Original change's description:
> Split test_support_unittests into smaller targets
>
> Drive by fix to rtc_cc_test to ensure that data is propegated.
>
> Bug: webrtc:498394143
> Change-Id: Ifffd8a8cfeea4c60de2afc57774f11116a6a6964
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/465664
> Reviewed-by: Jeremy Leconte <jleconte@google.com>
> Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#47515}

Bug: webrtc:498394143
Change-Id: Ia0879787485a34b7b770f093eda53215dc0868dc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/466882
Commit-Queue: Evan Shrubsole <eshr@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Jeremy Leconte <jleconte@google.com>
Cr-Commit-Position: refs/heads/main@{#47556}