RFR: 8316804: Gracefully handle the case where --release is not specified last [v3]

[Christian Stein]

> Please review this change for the `jar` tool to gracefully handle the case where `--release` is not specified as the last arguments.
> 
> Prior to this commit, operation modes `-d --describe-module` and `--validate` expected to read the optional `--release` option as a file argument: `jar -d -f a.jar --release 9`
> By adding a hidden GNU-style `--release` option, processing the optional arguments before in those two operation modes, the position is now no longer required to trail behind the `-f --file` option: `jar -d --release 9 -f a.jar`
> 
> 
> ==============================
> Test summary
> ==============================
>    TEST                                              TOTAL  PASS  FAIL ERROR
>    jtreg:test/jdk/tools/jar                             26    26     0     0
> ==============================
> TEST SUCCESS

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Add two more valid use-cases

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22079/files
  - new: https://git.openjdk.org/jdk/pull/22079/files/4f56a934..7d1cc733

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22079&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22079&range=01-02

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22079.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22079/head:pull/22079

PR: https://git.openjdk.org/jdk/pull/22079