RFR: 8351902: RISC-V: Several tests fail after JDK-8351145

[Hamlin Li]

Hi,
Can you help to review this simple patch?
These client tests seems not that useful to me, so the simple solution could be just disable them on riscv.

Thanks!

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/24027/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24027&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351902
  Stats: 3 lines in 3 files changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24027.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24027/head:pull/24027

PR: https://git.openjdk.org/jdk/pull/24027