[jdk17u-dev] RFR: 8317834: java/lang/Thread/IsAlive.java timed out

[Aleksey Shipilev]

Clean backport to improve reliability of recently added test.

Additional testing:
 - [x] MacOS AArch64 fastdebug, affected test still passes

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Commit messages:
 - Backport 5522656af73347439eac6ecfef35d4a8f3dce77d

Changes: https://git.openjdk.org/jdk17u-dev/pull/1975/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1975&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317834
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1975.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1975/head:pull/1975

PR: https://git.openjdk.org/jdk17u-dev/pull/1975