RFR: 8334078: TestIntVect.java fails without RVV after JDK-8332153

[Gui Cao]

Hi, test/hotspot/jtreg/compiler/c2/cr7200264/TestIntVect.java fails without RVV after [JDK-8332153](https://bugs.openjdk.org/browse/JDK-8332153) in fastdebug mode.  see jbs issue for exception information.

As discussed on jbs, we prefixed the single letter cpu features with rv so that there would be no problem. And to synchronize the test cases.

### Testing
- [ ] All Tests related to all changes in this patch on Banana Pi BPI-F3 board (with RVV1.0) (fastdebug)
- [ ] All Tests related to all changes in this patch on SOPHON SG2042 (fastdebug)
- [ ] Run tier1-3 tests on SOPHON SG2042 (fastdebug)

-------------

Commit messages:
 - Simplify strcat
 - 8334078: TestIntVect.java fails without RVV after JDK-8332153

Changes: https://git.openjdk.org/jdk/pull/19686/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19686&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334078
  Stats: 207 lines in 14 files changed: 3 ins; 149 del; 55 mod
  Patch: https://git.openjdk.org/jdk/pull/19686.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19686/head:pull/19686

PR: https://git.openjdk.org/jdk/pull/19686