RFR: 8286865: vmTestbase/vm/mlvm/meth/stress/jni/nativeAndMH/Test.java fails with Out of space in CodeCache

[Ramkumar Sunderbabu]

MethodHandle invocations with Xcomp are filling up CodeCache quickly in the test, especially in machines with high number of processors.
It is possible to measure code cache consumption per invocation, estimate overall consumption and bail out before CodeCache runs out of memory.
But it is much simpler to exclude the test for Xcomp flag.

Additional Change: MethodHandles.lookup was done unnecessarily invoked for all iterations. Replaced it with single invocation.

PS: This issue is not seen in JDK 20 and above, possibly due to JDK-8290025, but the exclusion guards against vagaries of CodeCache management.

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Commit messages:
 - 8286865: vmTestbase/vm/mlvm/meth/stress/jni/nativeAndMH/Test.java fails with Out of space in CodeCache

Changes: https://git.openjdk.org/jdk/pull/26840/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26840&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8286865
  Stats: 24 lines in 1 file changed: 15 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26840.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26840/head:pull/26840

PR: https://git.openjdk.org/jdk/pull/26840