RFR: 8338779: GenShen: Prefer log_develop_debug in performance critical code

[William Kemper]

Clean backport

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Commit messages:
 - Backport d2ed6519cace41354bbcd073b46a00c9055f6060

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/94/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=94&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338779
  Stats: 5 lines in 2 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/94.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/94/head:pull/94

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/94