RFR: 8328572: JFR: Use Class.forPrimitiveName(String)

[Erik Gahlin]

Could I have a review of change that use Class.forPrimitiveName(String) instead checking against every primitive type.

Testing: jdk/jdk/jfr

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/19235/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19235&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328572
  Stats: 73 lines in 1 file changed: 13 ins; 56 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/19235.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19235/head:pull/19235

PR: https://git.openjdk.org/jdk/pull/19235