RFR: 8331048: G1: Prune rebuild candidates based on G1HeapWastePercent early [v3]

[Ivan Walulya]

> Hi, 
> 
> Please review this change that moves the `G1CollectionSetChooser::build` out of the cleanup pause into the remark pause. This prunes the rebuild candidates based on G1HeapWastePercent, thereby reducing the rebuild time in cases where pruning happens. 
> 
> Testing: Tier 1 - 5
> 
> ![concurrent_rebuild](https://github.com/openjdk/jdk/assets/69453999/b14dd9d7-24e7-43ed-bf0f-5d3030d9180f)

Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:

  Refactor cleanup

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18970/files
  - new: https://git.openjdk.org/jdk/pull/18970/files/e67fe514..a95fd315

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18970&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18970&range=01-02

  Stats: 23 lines in 5 files changed: 8 ins; 2 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/18970.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18970/head:pull/18970

PR: https://git.openjdk.org/jdk/pull/18970