RFR: 8355668: RISC-V: jdk/incubator/vector/Int256VectorTests.java fails when using RVV [v5]

[Gui Cao]

> Hi, After https://github.com/openjdk/jdk/pull/24129, some tests run failed. due to the fact that the later predicate condition overrides the previous one.
> 
> ### Testing
> qemu-system 9.1.50 with UseRVV:
> 
> - [x] Run test/jdk/jdk/incubator/vector (fastdebug)

Gui Cao has updated the pull request incrementally with one additional commit since the last revision:

  Fix for RealYang comment

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24910/files
  - new: https://git.openjdk.org/jdk/pull/24910/files/80e9c6f7..b1a229b6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24910&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24910&range=03-04

  Stats: 12 lines in 1 file changed: 0 ins; 0 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/24910.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24910/head:pull/24910

PR: https://git.openjdk.org/jdk/pull/24910