RFR: 8310711: [IR Framework] Remove safepoint while printing handling [v2]

[Christian Hagedorn]

> This clean-up PR removes the handling of the `` message in the IR framework. It is no longer required since we dump the output of `PrintIdeal` to the hotspot_pid file differently since [JDK-8306922](https://bugs.openjdk.org/browse/JDK-8306922). There is no interrupting `` message anymore. I removed the corresponding now unneeded code together with the previously added test case for it.
> 
> Testing: tier1-4
> 
> Thanks,
> Christian

Christian Hagedorn 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 three additional commits since the last revision:

 - Update copyright year
 - Merge branch 'master' into JDK-8310711
 - 8310711: [IR Framework] Remove safepoint while printing handling

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16921/files
  - new: https://git.openjdk.org/jdk/pull/16921/files/ed5ef1fd..38f00cc3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16921&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16921&range=00-01

  Stats: 121382 lines in 2594 files changed: 66365 ins; 45354 del; 9663 mod
  Patch: https://git.openjdk.org/jdk/pull/16921.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16921/head:pull/16921

PR: https://git.openjdk.org/jdk/pull/16921