Reduce and Resolve Broad Checkstyle Suppressions

The current https://github.com/checkstyle/patch-filters/blob/master/config/suppressions.xml contains several broad suppressions that disable Checkstyle rules across many files (for example `LineLength`, `FinalParameters`, `RightCurly`, and `Translation` on `*.java`). These were originally added during upgrades and legacy transitions, but they now hide real violations and reduce the effectiveness of static analysis.

In particular:

- There are legacy suppressions marked as temporary but still present.
- Some suppressions apply to all Java files (`files=".*\.java"`), which is too wide and prevents detection of new issues.
- Suppressions added during the Checkstyle `13.3.0` upgrade should be resolved incrementally instead of remaining permanent.

Feel free to pick any suppression and fix it one at a time in separate PRs so the changes stay easy to review.