RFR: 8324229: JFR: Temporarily disable assertion for missing object reference

[Erik Gahlin]

Could I have a review of a change that temporarily disables an assertion.

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/17504/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17504&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324229
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17504.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17504/head:pull/17504

PR: https://git.openjdk.org/jdk/pull/17504