[jdk21u-dev] RFR: 8325037: x86: enable and fix hotspot/jtreg/compiler/vectorization/TestRoundVectFloat.java

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport ed068469f3852aa69a27fe0f267d1828a0e59aec

Changes: https://git.openjdk.org/jdk21u-dev/pull/878/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=878&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325037
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/878.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/878/head:pull/878

PR: https://git.openjdk.org/jdk21u-dev/pull/878