RFR: 8330205: Initial troff manpage generation for JDK 24

[David Holmes]

Sets the version to 24/24-ea and the copyright year to 2025.

Content changes related to the start of release (e.g. for removed options in java.1) are handled separately.

This initial generation also picks up the unpublished changes from: 

- JDK-8330807: Update Manpage for obsoletion of ScavengeBeforeFullGC
- JDK-8284500: Typo in Supported Named Extensions - BasicContraints
- JDK-8324342: Doclet should default @since for a nested class to that of its enclosing class

Thanks

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Commit messages:
 - 8330205: Initial troff manpage generation for JDK 24

Changes: https://git.openjdk.org/jdk/pull/19617/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19617&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330205
  Stats: 66 lines in 28 files changed: 12 ins; 13 del; 41 mod
  Patch: https://git.openjdk.org/jdk/pull/19617.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19617/head:pull/19617

PR: https://git.openjdk.org/jdk/pull/19617