NamedMutex outerloop test failures

[jakobbotsch]

Link: https://dev.azure.com/dnceng-public/public/_build/results?buildId=169947&view=results

paltests <PrintPalTests|TestName>
Either print list of all paltests by passing PrintPalTests, or run a single PAL test.
'paltest_namedmutex_test1' failed at line 298. Expression: WaitForMutexToBeCreated(testName, childEvents[0], ChildEventNamePrefix0)
'paltest_namedmutex_test1' failed at line 495. Expression: InitializeParent(testName, parentEvents, childEvents)
'paltest_namedmutex_test1' failed at line 598. Expression: MutualExclusionTests_Parent()
paltests <PrintPalTests|TestName>
Either print list of all paltests by passing PrintPalTests, or run a single PAL test.
'paltest_namedmutex_test1' failed at line 298. Expression: WaitForMutexToBeCreated(testName, childEvents[0], ChildEventNamePrefix0)
'paltest_namedmutex_test1' failed at line 608. Expression: InitializeParent(testName, parentEvents, childEvents)
'paltest_namedmutex_test1' failed at line 686. Expression: LifetimeTests_Parent()
paltests <PrintPalTests|TestName>
Either print list of all paltests by passing PrintPalTests, or run a single PAL test.
'paltest_namedmutex_test1' failed at line 298. Expression: WaitForMutexToBeCreated(testName, childEvents[0], ChildEventNamePrefix0)
'paltest_namedmutex_test1' failed at line 729. Expression: InitializeParent(testName, parentEvents, childEvents)
'paltest_namedmutex_test1' failed at line 934. Expression: AbandonTests_Parent()
paltests <PrintPalTests|TestName>
Either print list of all paltests by passing PrintPalTests, or run a single PAL test.
'paltest_namedmutex_test1' failed at line 298. Expression: WaitForMutexToBeCreated(testName, childEvents[0], ChildEventNamePrefix0)
'paltest_namedmutex_test1' failed at line 957. Expression: InitializeParent(testName, parentEvents, childEvents)
'paltest_namedmutex_test1' failed at line 1089. Expression: LockAndCloseWithoutThreadExitTests_Parent_CloseOnSameThread()

Maybe related to #81604? cc @am11 @AaronRobinsonMSFT

[am11]

Hmm, it is failing on linux musl / linux arm and passing on the rest of the platforms. Without the fix, it fails on osx-arm64:

Finished running PAL tests.

PAL Test Results:
  Passed: 437
  Failed: 0

[BruceForstall]

@janvorli