RFR: 8374316: Update copyright year to 2025 for hotspot in files where it was missed

[Sergey Bylokhov]

On Wed, 24 Dec 2025 00:16:59 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The copyright year in hotspot files updated in 2025 has been bumped to 2025. (to minimize... the patch...for now, all files modified by the commits in src/hotspot have been updated only.)
> 
> 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 `

I will update this PR to include all changes in src/hotspot and test/hotspot only. The rest will be done separately.

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PR Comment: https://git.openjdk.org/jdk/pull/28970#issuecomment-3693798808