[jdk21u-dev] RFR: 8326525: com/sun/tools/attach/BasicTests.java does not verify AgentLoadException case

[Goetz Lindenmaier]

I backport this for parity with 21.0.7-oracle

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Commit messages:
 - Backport b8fc4186d59ce21e878c4de30983d7cacf69b7a5

Changes: https://git.openjdk.org/jdk21u-dev/pull/1331/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1331&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326525
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1331.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1331/head:pull/1331

PR: https://git.openjdk.org/jdk21u-dev/pull/1331