RFR: 8329113: Deprecate -XX:+UseNotificationThread [v2]

[Alex Menkov]

> The fix deprecates -XX:+UseNotificationThread VM option
> 
> Testing: tier1-3,hs-tier5-svc

Alex Menkov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:

 - Merge branch 'master' into deprecate_notif_thread
 - fix

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Changes: https://git.openjdk.org/jdk/pull/18852/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18852&range=01
  Stats: 3 lines in 3 files changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18852.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18852/head:pull/18852

PR: https://git.openjdk.org/jdk/pull/18852