RFR: JDK-8298035: Provide better descriptions for JIT compiler JFR events

Mon Dec 5 09:19:18 UTC 2022

Most Compiler related JFR events lack descriptions, see
https://sap.github.io/SapMachine/jfrevents/20.html#jvm-compiler

We should add some helpful description texts for these JFR events.

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Commit messages:
 - JDK-8298035

Changes: https://git.openjdk.org/jdk/pull/11506/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11506&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298035
  Stats: 59 lines in 2 files changed: 50 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/11506.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11506/head:pull/11506

PR: https://git.openjdk.org/jdk/pull/11506