RFR: 8347434: Richer VM operations events logging

[Aleksey Shipilev]

A simpler quality of diagnostics improvement. In hs_err, it is not abundantly clear if executed VM operations took safepoint or not, were nested or not. It would be good to print that out.

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/23039/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23039&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347434
  Stats: 11 lines in 1 file changed: 0 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/23039.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23039/head:pull/23039

PR: https://git.openjdk.org/jdk/pull/23039