[jdk21u-dev] RFR: 8322062: com/sun/jdi/JdwpAllowTest.java does not performs negative testing with prefix length

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport 459957f30a6e0fe40636dd72faa3f0d86151c94f

Changes: https://git.openjdk.org/jdk21u-dev/pull/783/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=783&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8322062
  Stats: 26 lines in 1 file changed: 8 ins; 0 del; 18 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/783.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/783/head:pull/783

PR: https://git.openjdk.org/jdk21u-dev/pull/783