RFR: 8351662: [Test] RISC-V: enable bunch of IR test

[Hamlin Li]

Hi,
Can you help to review this patch?

There are bunch of IR test not enabled on riscv, it's good to enable them, because enabling them will help to:
1. cover the test gap
2. find out potential missing intrinsics.

This patch also changes cpu features from `vm.opt.UseXxx` to `xxx`, as it's easier to find out these tests in the future.

NOTE: There are still some other test should be enabled, but currently they fail when simply enable them, they will be further investigated, later could be enabled in other PRs with additional code change/implementation if it's feasible.

Thanks!

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/23985/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23985&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351662
  Stats: 247 lines in 32 files changed: 22 ins; 6 del; 219 mod
  Patch: https://git.openjdk.org/jdk/pull/23985.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23985/head:pull/23985

PR: https://git.openjdk.org/jdk/pull/23985