RFR: 8374352: Update copyright year to 2025 for test/langtools/tools/javac/ in files where it was missed

[Sergey Bylokhov]

The copyright year in "test/langtools/tools/javac/" files updated in 2025 has been bumped to 2025.

The next command can be run (on top of this PR) to verify that each file had prior commits in 2025:

`git diff HEAD~1 --name-only | while read f; do git log HEAD~1 --since="2025-01-01" --oneline -- "$f" | head -1 | grep -q . || echo "NOT IN 2025: $f"; done`

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Commit messages:
 - 8374352: Update copyright year to 2025 for test/langtools/tools/javac/ in files where it was missed

Changes: https://git.openjdk.org/jdk/pull/28989/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28989&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374352
  Stats: 152 lines in 152 files changed: 0 ins; 0 del; 152 mod
  Patch: https://git.openjdk.org/jdk/pull/28989.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28989/head:pull/28989

PR: https://git.openjdk.org/jdk/pull/28989