RFR: 8334714: Class-File API leaves preview [v2]

[Adam Sotona]

> Class-File API is leaving preview.
> This is a removal of all `@PreviewFeature` annotations from Class-File API.
> It also bumps all `@since` tags and removes `jdk.internal.javac.PreviewFeature.Feature.CLASSFILE_API`.
> 
> Please review.
> 
> Thanks,
> Adam

Adam Sotona has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge branch 'master' into JDK-8334714-final
 - bumped @since tag
 - 8334714: Class-File API leaves preview

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Changes: https://git.openjdk.org/jdk/pull/19826/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19826&range=01
  Stats: 715 lines in 166 files changed: 0 ins; 477 del; 238 mod
  Patch: https://git.openjdk.org/jdk/pull/19826.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19826/head:pull/19826

PR: https://git.openjdk.org/jdk/pull/19826