RFR: 8329781: Serial: Remove serialFullGC.inline.hpp

[Guoxiong Li]

Hi all,

This patch moves the content of `serialFullGC.inline.hpp` to `serialFullGC.cpp`. Thanks for taking the time to review.

Best Regards,
-- Guoxiong

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Commit messages:
 - JDK-8329781

Changes: https://git.openjdk.org/jdk/pull/18744/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18744&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329781
  Stats: 95 lines in 2 files changed: 28 ins; 65 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18744.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18744/head:pull/18744

PR: https://git.openjdk.org/jdk/pull/18744