RFR: 8288947: G1: Consolidate per-region info query in G1CollectedHeap

Wed Jun 22 10:09:18 UTC 2022

Simple change of removing `_humongous_reclaim_candidates`.

Test: tier1-6

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Commit messages:
 - g1-remove-humongous-table

Changes: https://git.openjdk.org/jdk/pull/9233/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9233&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288947
  Stats: 49 lines in 5 files changed: 4 ins; 37 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/9233.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9233/head:pull/9233

PR: https://git.openjdk.org/jdk/pull/9233