[jdk21u-dev] RFR: 8333248: VectorGatherMaskFoldingTest.java failed when maximum vector bits is 64

[sophia-guo]

Hi,  I would like to backport[ 8333248](https://bugs.openjdk.org/browse/JDK-8333248) to jdk21u.  As [JDK-8325520](https://bugs.openjdk.org/browse/JDK-8325520) was also backported to 21 so the test now fails on risc-v there.

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Commit messages:
 - Backport 9b0a5c5cd056262fab99525e9260762b617152a3

Changes: https://git.openjdk.org/jdk21u-dev/pull/1100/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1100&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333248
  Stats: 29 lines in 1 file changed: 0 ins; 0 del; 29 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1100.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1100/head:pull/1100

PR: https://git.openjdk.org/jdk21u-dev/pull/1100