RFR: 8368740: Serial: Swap eden and survivor spaces position in young generation [v3]

[Albert Mingkun Yang]

> Change the relative position of eden and survior spaces in young-gen so that eden can be expanded to fulfill allocation request in heap-near-full scenario. What is on master doesn't allow eden expansion if there is live objs inside from/to after full-gc.
> 
> Test: tier1-8

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 sgc-expand-allocate
 - review
 - sgc-expand-allocate

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27513/files
  - new: https://git.openjdk.org/jdk/pull/27513/files/57a88bd4..36d52e42

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27513&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27513&range=01-02

  Stats: 23459 lines in 811 files changed: 14449 ins; 4692 del; 4318 mod
  Patch: https://git.openjdk.org/jdk/pull/27513.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27513/head:pull/27513

PR: https://git.openjdk.org/jdk/pull/27513