TestVectorizationMismatchedAccess fails on Big Endian platforms (s390x Linux / JDK23)

[smlambert]

Seen in #5693 (comment)

TestVectorizationMismatchedAccess fails and needs exclusion under https://bugs.openjdk.org/browse/JDK-8342489

TestVectorizationMismatchedAccess fails with:
java.lang.RuntimeException: fix test that was written for a little endian platform
	at compiler.c2.irTests.TestVectorizationMismatchedAccess.main(TestVectorizationMismatchedAccess.java:54)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
	at java.base/java.lang.Thread.run(Thread.java:1575)

JavaTest Message: Test threw exception: java.lang.RuntimeException: fix test that was written for a little endian platform
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: fix test that was written for a little endian platform