RFR: 8368740: Serial: Swap eden and survivor spaces position in young generation [v2]

[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 incrementally with one additional commit since the last revision:

  review

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27513/files
  - new: https://git.openjdk.org/jdk/pull/27513/files/56c2b0e3..57a88bd4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27513&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27513&range=00-01

  Stats: 15 lines in 1 file changed: 11 ins; 1 del; 3 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