RFR: 8323002: test/jdk/java/lang/Thread/virtual/stress/GetStackTraceALotWhenPinned.java times out on macosx-x64

[Alan Bateman]

This test was recently added by JDK-8322818. On some test systems, the test passes a bit after the timeout so the test is marked as failed. The changes here dial down the iterations from 100k to 25k to reduce the execution time for release builds. No change for debug builds as this already uses a small number of iterations.

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/17265/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17265&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323002
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/17265.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17265/head:pull/17265

PR: https://git.openjdk.org/jdk/pull/17265