RFR: 8345804: Update copyright year to 2024 for langtools in files where it was missed

[Magnus Ihse Bursie]

Some files have been modified in 2024, but the copyright year has not been properly updated. This should be fixed. 

I have located these modified files using:

git log --since="Jan 1" --name-only --pretty=format: | sort -u > file.list

and then run a script to update the copyright year to 2024 on these files.

I have made a manual sampling of files in the list to verify that they have indeed been modified in 2024.

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Commit messages:
 - 8345804: Update copyright year to 2024 for langtools in files where it was missed

Changes: https://git.openjdk.org/jdk/pull/22643/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22643&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345804
  Stats: 400 lines in 424 files changed: 0 ins; 0 del; 400 mod
  Patch: https://git.openjdk.org/jdk/pull/22643.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22643/head:pull/22643

PR: https://git.openjdk.org/jdk/pull/22643