[jdk19u] RFR: 8292654: G1 remembered set memory footprint regression after JDK-8286115

[Thomas Schatzl]

Backport of 8a45abd5f3bb224e564c8e6087bac618147f484e, fixing memory regression.

Applies cleanly, works without a problem for a few weeks in tip.

Thanks,
  Thomas

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Commit messages:
 - 8292654: G1 remembered set memory footprint regression after JDK-8286115

Changes: https://git.openjdk.org/jdk19u/pull/18/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19u&pr=18&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292654
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk19u/pull/18.diff
  Fetch: git fetch https://git.openjdk.org/jdk19u pull/18/head:pull/18

PR: https://git.openjdk.org/jdk19u/pull/18