[jdk23u] RFR: 8343205: CompileBroker::possibly_add_compiler_threads excessively polls available memory

[Martin Doerr]

Clean backport of [JDK-8343205](https://bugs.openjdk.org/browse/JDK-8343205).

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Commit messages:
 - Backport 75801992a7c626d409f66e2491082dba84c6fe45

Changes: https://git.openjdk.org/jdk23u/pull/214/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=214&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8343205
  Stats: 27 lines in 2 files changed: 16 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk23u/pull/214.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/214/head:pull/214

PR: https://git.openjdk.org/jdk23u/pull/214