RFR: 8359701: G1: Move heap expansion time tracking of G1CollectedHeap:expand to call site [v2]

[Albert Mingkun Yang]

> Simple patch of moving time-tracking logic from callee to caller, which removes a default arg. The default-arg is there because there are other callers that don't use/need this time-tracking logic.
> 
> Test: tier1

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:

 - Merge branch 'master' into g1-expand-time
 - review
 - g1-expand-time

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25835/files
  - new: https://git.openjdk.org/jdk/pull/25835/files/2c358c59..50fcbc22

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25835&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25835&range=00-01

  Stats: 1260 lines in 35 files changed: 404 ins; 751 del; 105 mod
  Patch: https://git.openjdk.org/jdk/pull/25835.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25835/head:pull/25835

PR: https://git.openjdk.org/jdk/pull/25835