RFR: 8374383: Update the copyright year to 2025 in the remaining files under test/ where it was missed

[Jaikiran Pai]

On Mon, 29 Dec 2025 22:27:22 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The copyright year in test/* files updated in 2025 has been bumped to 2025.
> 
> Updates to some tests in the test/langtools/jdk/javadoc/ group are skipped because some tests depend on exact output.
> 
> The next command can be run (on top of this PR) to verify that each file had prior commits in 2025:
> 
> `git diff origin/master --name-only | while read f; do git log origin/master --since="2025-01-01" --oneline -- "$f" | head -1 | grep -q . || echo "NOT IN 2025: $f"; done`

Looks OK to me. I did a trivial verification that the files updated in this PR were indeed updated in 2025.

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Marked as reviewed by jpai (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29006#pullrequestreview-3620246101