RFR: 8314745: JFR: @StackFilter

[Erik Gahlin]

Could I have a review of change that allows stack frames to be filtered out.

For now, that mechanism is only available for JDK events, but plan is to make the annotation public once we feel confident the API is correct.

Testing: tier1 + tier2 + jdk/jdk/jfr/

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/16726/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16726&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314745
  Stats: 916 lines in 28 files changed: 892 ins; 1 del; 23 mod
  Patch: https://git.openjdk.org/jdk/pull/16726.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16726/head:pull/16726

PR: https://git.openjdk.org/jdk/pull/16726