RFR: 8265754: Move suspend/resume API from HandshakeState [v10]

[Anton Artemov]

> Hi,
> 
> in this PR the suspend/resume methods are moved away from the HandshakeState class into a new separate class SuspendResumeManager. 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 27 additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into JDK-8265754
 - 8265754: Changed handshakee to target.
 - 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.
 - ... and 17 more: https://git.openjdk.org/jdk/compare/d5575c1a...8d24cd75

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25407/files
  - new: https://git.openjdk.org/jdk/pull/25407/files/272b0293..8d24cd75

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25407&range=09
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25407&range=08-09

  Stats: 11155 lines in 390 files changed: 7807 ins; 2524 del; 824 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