RFR: 8364962: G1: Inline G1CollectionSet::finalize_incremental_building

[Thomas Schatzl]

Hi all,

  please review this inlining of `G1CollectionSet::finalize_incremental_building` - it does not do anything useful for some time now, only some fairly generic asserts. There is only one caller too.

Testing: gha

Thanks,
  Thomas

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Commit messages:
 - 8364962

Changes: https://git.openjdk.org/jdk/pull/26687/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26687&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364962
  Stats: 11 lines in 2 files changed: 1 ins; 8 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26687.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26687/head:pull/26687

PR: https://git.openjdk.org/jdk/pull/26687