RFR: 8288935: Remove excessive includes introduced in loom

[Ioi Lam]

Some header files introduced in loom has unnecessary #includes. 

Also, some hpp files have complex inline functions that should be moved to either inline.hpp or cpp files.

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Commit messages:
 - fixed GHA
 - step2
 - temp

Changes: https://git.openjdk.org/jdk/pull/9231/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9231&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288935
  Stats: 91 lines in 11 files changed: 45 ins; 42 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/9231.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9231/head:pull/9231

PR: https://git.openjdk.org/jdk/pull/9231