[jdk17u-dev] RFR: 8369992: JFR: Disable Placeholder-, LoaderConstraints- and ProtectionDomainCacheTableStatistics in default.jfc

[Goetz Lindenmaier]

I backport this for parity with 17.0.18-oracle.

First, there was the attempt to delete these events, see backport of https://bugs.openjdk.org/browse/JDK-8291733: Remove JFR events that expose hashtable

@eghalin pointed out to me that Oracle reverts this (See [JDK-8369975](https://bugs.openjdk.org/browse/JDK-8369975) [BACKOUT BACKPORT] Remove JFR events that expose hashtable) and instead disables the events, 
see also comment in https://github.com/openjdk/jdk17u-dev/pull/4047 

This now implements the backport according to that comment.

Thanks again, Eric, for informing about this.

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Commit messages:
 - backport JDK-8369992

Changes: https://git.openjdk.org/jdk17u-dev/pull/4108/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=4108&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369992
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/4108.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/4108/head:pull/4108

PR: https://git.openjdk.org/jdk17u-dev/pull/4108