RFR: 8347804: GenShen: Crash with small GCCardSizeInBytes and small Java heap

[William Kemper]

Not clean, conflicts with SIZE_FORMAT macro removal.

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Commit messages:
 - Backport 0a4c5a8a483b23ec8c534054187c44f986d137bb

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/170/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=170&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347804
  Stats: 86 lines in 5 files changed: 63 ins; 4 del; 19 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/170.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/170/head:pull/170

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/170