Add riscv exclude for jdk23 VectorGatherMaskFoldingTest (adoptium#5632) (adoptium#5634)

Author: jiekang

openjdk/excludes/ProblemList_openjdk23.txt

@@ -385,7 +385,7 @@ compiler/codecache/MHIntrinsicAllocFailureTest.java https://bugs.openjdk.org/bro
 compiler/whitebox/ForceNMethodSweepTest.java https://bugs.openjdk.org/browse/JDK-8265181 linux-arm
 compiler/codegen/aes/Test8292158.java https://github.com/adoptium/aqa-tests/issues/4470 linux-s390x
 compiler/codegen/aes/TestAESMain.java https://github.com/adoptium/aqa-tests/issues/4470 linux-s390x
-compiler/vectorapi/VectorGatherMaskFoldingTest.java https://bugs.openjdk.org/browse/JDK-8333248 linux-s390x
+compiler/vectorapi/VectorGatherMaskFoldingTest.java https://bugs.openjdk.org/browse/JDK-8333248 linux-s390x,linux-riscv64
 
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