RFR: 8346046: Enable copyright header format check [v2]

[Erik Joelsson]

On Fri, 13 Dec 2024 17:18:10 GMT, Zhao Song <zsong at openjdk.org> wrote:

>> As requested in [SKARA-1357](https://bugs.openjdk.org/browse/SKARA-1357), now skara bot is able to check the copyright header format.
>> Now I am going to update the jcheck configuration to configure copyright check as an error.
>
> Zhao Song has updated the pull request incrementally with one additional commit since the last revision:
> 
>   exclude more files

Marked as reviewed by erikj (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/22721#pullrequestreview-2502796917