[jdk22u] RFR: 8331931: JFR: Avoid loading regex classes during startup [v2]

[Xiaolong Peng]

> Backport [JDK-8331931](https://bugs.openjdk.org/browse/JDK-8331931) JFR: Avoid loading regex classes during startup
> 
> 
> ### Validation
> Run test ```make test TEST=jdk/jdk/jfr```, all tests passed.
> 
> 
> Test results: passed: 592
> Report written to /local/home/xlpeng/repos/jdk22u-xlpeng/build/linux-aarch64-server-fastdebug/test-results/jtreg_test_jdk_jdk_jfr/html/report.html
> Results written to /local/home/xlpeng/repos/jdk22u-xlpeng/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_jdk_jdk_jfr
> Finished running test 'jtreg:test/jdk/jdk/jfr'
> Test report is stored in build/linux-aarch64-server-fastdebug/test-results/jtreg_test_jdk_jdk_jfr
> 
> ==============================
> Test summary
> ==============================
>    TEST                                              TOTAL  PASS  FAIL ERROR   
>    jtreg:test/jdk/jdk/jfr                              592   592     0     0   
> ==============================
> TEST SUCCESS
> 
> Finished building target 'test' in configuration 'linux-aarch64-server-fastdebug'

Xiaolong Peng 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 two additional commits since the last revision:

 - Merge branch 'openjdk:master' into backport
 - Backport 242446b07fcfcac136510495d1ff16d26859aea4

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

Changes:
  - all: https://git.openjdk.org/jdk22u/pull/241/files
  - new: https://git.openjdk.org/jdk22u/pull/241/files/87b47b2b..fb8d8a41

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk22u&pr=241&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk22u&pr=241&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk22u/pull/241.diff
  Fetch: git fetch https://git.openjdk.org/jdk22u.git pull/241/head:pull/241

PR: https://git.openjdk.org/jdk22u/pull/241