[jdk21u] RFR: 8318540: make test cannot run .jasm tests directly

[Aleksey Shipilev]

Clean backport to improve testing capabilities.

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Commit messages:
 - Backport bd02cfd96f80abd1559ea3531a21c28c1f670f5d

Changes: https://git.openjdk.org/jdk21u/pull/281/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=281&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318540
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u/pull/281.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/281/head:pull/281

PR: https://git.openjdk.org/jdk21u/pull/281