RFR: 8346920: Serial: Support allocation in old generation before GC [v2]

[Albert Mingkun Yang]

> This PR introduces a new strategy to determine whether an allocation should be attempted in the old generation or if a GC cycle should be initiated, based on the `GCTimeRatio`. With this change, the benchmark attached to the ticket now completes in ~13 GC, a significant improvement compared to the >1000 GC observed previously.
> 
> Test: tier1-3

Albert Mingkun Yang has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - review
 - Merge branch 'master' into s1-gc-time-ratio
 - s1-gc-time-ratio

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22899/files
  - new: https://git.openjdk.org/jdk/pull/22899/files/ee6300d7..52aa4ce4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22899&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22899&range=00-01

  Stats: 1173 lines in 32 files changed: 31 ins; 1082 del; 60 mod
  Patch: https://git.openjdk.org/jdk/pull/22899.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22899/head:pull/22899

PR: https://git.openjdk.org/jdk/pull/22899