RFR: 8265754: Move suspend/resume API from HandshakeState [v8]

[Anton Artemov]

> Hi,
> 
> in this PR the suspend/resume methods are moved away from the HandshakeState class into a new separate class HandshakeSuspender. The idea is that the state class should be a state keeper and should not be responsible for actions which change the state. Such actions should be done by a separate class. 
> 
> Tested in tiers 1-4.

Anton Artemov 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 25 additional commits since the last revision:

 - 8265754: Added a comment.
 - Merge remote-tracking branch 'origin/master' into JDK-8265754
 - 8265754: Fixed build problem
 - 8265754: Fixed typo.
 - 8265754: Fixing spaces.
 - 8265754: Refactoring into separate file.
 - 8265754: Refactoring.
 - 8265754: Refactoring.
 - 8265754: Refactoring.
 - 8265754: Refactoring.
 - ... and 15 more: https://git.openjdk.org/jdk/compare/b18dbfea...c07b29ea

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25407/files
  - new: https://git.openjdk.org/jdk/pull/25407/files/4c984b2e..c07b29ea

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25407&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25407&range=06-07

  Stats: 18166 lines in 446 files changed: 15049 ins; 1382 del; 1735 mod
  Patch: https://git.openjdk.org/jdk/pull/25407.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25407/head:pull/25407

PR: https://git.openjdk.org/jdk/pull/25407