RFR: 8355652: Parse ClassFileFormatVersion from ClassFileVersion [v2]

[simon]

> 8355652: add new method to return ClassFileFormatVersion from ClassFileVersion.
> ---------
> ### Progress
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simon has updated the pull request incrementally with two additional commits since the last revision:

 - 8355652: update copyright year to 2025 in ClassFileVersionImpl.java
 - 8355652: update copyright year to 2025 in ClassFileVersionImpl.java

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/26406/files
  - new: https://git.openjdk.org/jdk/pull/26406/files/ab67e498..d4ff0b6d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26406&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26406&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26406.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26406/head:pull/26406

PR: https://git.openjdk.org/jdk/pull/26406