RFR: 8330077: Allow max number of events to be buffered to be configurable to avoid OVERFLOW_EVENT [v13]

[Fabian Meumertzheim]

> The limit on the number of events buffered for a single `j.n.f.WatchKey` is now configurable via the `sun.nio.fs.maxWatchEvents`.

Fabian Meumertzheim has updated the pull request incrementally with one additional commit since the last revision:

  Attemp to deflake test and add better output on failures

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18739/files
  - new: https://git.openjdk.org/jdk/pull/18739/files/6b3b2436..dc920736

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18739&range=12
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18739&range=11-12

  Stats: 25 lines in 1 file changed: 14 ins; 3 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/18739.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18739/head:pull/18739

PR: https://git.openjdk.org/jdk/pull/18739