RFR: 8351594: JFR: Rate-limited sampling of Java events

[Erik Gahlin]

Could I have review of an enhancement that adds rate-limited sampling to Java event, including five events in the JDK (SocketRead, SocketWrite, FileRead, FileWrite, and JavaExceptionThrow).

Testing: test/jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Consistent annotation
 - Fix typos
 - Fix whitespace
 - Initial

Changes: https://git.openjdk.org/jdk/pull/25559/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25559&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351594
  Stats: 1230 lines in 37 files changed: 1028 ins; 87 del; 115 mod
  Patch: https://git.openjdk.org/jdk/pull/25559.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25559/head:pull/25559

PR: https://git.openjdk.org/jdk/pull/25559