RFR: 7903498: JMH: Reset worker interrupt status after iteration

[Aleksey Shipilev]

We need to handle the interrupts that are not captured by infra methods.

Additional testing: 
 - [ ] Multiple iterations of GHA-like testing

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Commit messages:
 - Extra safety at start
 - Fix comments
 - Fix

Changes: https://git.openjdk.org/jmh/pull/112/files
 Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=112&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7903498
  Stats: 16 lines in 1 file changed: 11 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/jmh/pull/112.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/112/head:pull/112

PR: https://git.openjdk.org/jmh/pull/112