RFR: 8357408: runtime/interpreter/CountBytecodesTest.java should be flagless

[Lei Zhu]

I changed `@requires` to `vm.flagless` and it passed the test. If there is anything inappropriate, please let me know and I will modify it in time.

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Commit messages:
 - vm.flagless

Changes: https://git.openjdk.org/jdk/pull/25427/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25427&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357408
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25427.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25427/head:pull/25427

PR: https://git.openjdk.org/jdk/pull/25427