Updates ReentrantReadWriteLock to support more than 65k readers and writers

[viktorklang-ora]

Added here for discussion

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/23828/head:pull/23828
$ git checkout pull/23828

Update a local copy of the PR:
$ git checkout pull/23828
$ git pull https://git.openjdk.org/jdk.git pull/23828/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 23828

View PR using the GUI difftool:
$ git pr show -t 23828

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/23828.diff

[bridgekeeper]

👋 Welcome back vklang! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[viktorklang-ora]

@DougLea @AlanBateman Added this draft PR which also has a test which validates that it's possible to create more than an unsigned short worth of owners for the read lock.

[openjdk]

@viktorklang-ora The following label will be automatically applied to this pull request:

• core-libs

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.