RFR: 8355657: RISC-V: Improve PrintOptoAssembly output of vector-scalar instructions

[Anjian-Wen]

As the issue describe, some match rule and predict match not only type I, in case of the misleading, try to delete some "I" in the format and instruct name

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Commit messages:
 - RISC-V: Improve PrintOptoAssembly output of vector-scalar instructions

Changes: https://git.openjdk.org/jdk/pull/24904/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24904&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355657
  Stats: 80 lines in 1 file changed: 0 ins; 0 del; 80 mod
  Patch: https://git.openjdk.org/jdk/pull/24904.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24904/head:pull/24904

PR: https://git.openjdk.org/jdk/pull/24904