Bring back `.YYYYMMDD` suffixes for `google-re2` versioning.

While I'm here, update @abseil-cpp to version 20240116.2.

Fixes #486.

Change-Id: I86ec3bd1860e2bd1424a67eb5590eaaa7cc4ea71
Reviewed-on: https://code-review.googlesource.com/c/re2/+/62990
Reviewed-by: Paul Wankadia <junyer@google.com>
Reviewed-by: Alex Chernyakhovsky <achernya@google.com>