[jdk21u] RFR: 8308047: java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java timed out and also had jcmd pipe errors

[Ravi Reddy]

The test used a too-small heap for generic testing, and coupled with looking at freeMemory() it led to a less-than-ideal determinism of execution of the test.
It is a clean backport of https://github.com/openjdk/jdk/commit/8c9d091f19760deece8daf3e57add85482b9f2a7 .

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Commit messages:
 - 8308047: java/util/concurrent/ScheduledThreadPoolExecutor/BasicCancelTest.java timed out and also had jcmd pipe errors

Changes: https://git.openjdk.org/jdk21u/pull/46/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=46&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308047
  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u/pull/46.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/46/head:pull/46

PR: https://git.openjdk.org/jdk21u/pull/46