RFR: 8374365: Update copyright year to 2025 for test/jdk in files where it was missed

[Paul Hohensee]

On Fri, 26 Dec 2025 02:35:31 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The copyright year in "test/jdk" files updated in 2025 has been bumped to 2025. This covers all tests in test/jdk to avoid submitting additional PRs.
> 
> **Note:** I have skipped some files updated by the: https://github.com/openjdk/jdk/commit/24a734938e5 and https://github.com/openjdk/jdk/commit/5e1cc082593 where files were renamed.
> 
> 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`

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28997#pullrequestreview-3613936569