RFR: 8330003: Serial: Move the logic of FastEvacuateFollowersClosure to SerialHeap [v3]

[Guoxiong Li]

> Hi all,
> 
> This patch moves the content of `FastEvacuateFollowersClosure::do_void` to `SerialHeap::scan_evacuated_objs`.
> 
> Thanks for taking the time to review.
> 
> Best Regards,
> -- Guoxiong

Guoxiong Li has updated the pull request incrementally with two additional commits since the last revision:

 - Remove templates. Inline method.
 - Revert previous changement.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18725/files
  - new: https://git.openjdk.org/jdk/pull/18725/files/fa81d427..e448e45a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18725&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18725&range=01-02

  Stats: 37 lines in 7 files changed: 9 ins; 19 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/18725.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18725/head:pull/18725

PR: https://git.openjdk.org/jdk/pull/18725