RFR: 1357: Add Oracle copyright header format check to jcheck [v2]

[Zhao Song]

On Fri, 6 Dec 2024 11:47:18 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> I definitely agree that file patterns that should be checked should be defined in .jcheck/conf.
>
> I also think it would be better to not have any defaults and just define the patterns in `.jcheck/conf`

Yes, I discussed with Erik offline yesterday, and we agreed on removing the default setting for this check.

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PR Review Comment: https://git.openjdk.org/skara/pull/1702#discussion_r1873691093