[jdk21] RFR: 8309957: Rename JDK-8309595 test to conform

[Jim Laskey]

As a matter of style, tests are typically in a class whose name begins Test in a directory whose name begins test.

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Commit messages:
 - Backport 1d1ed0d8f7af28ce2a394f020f1732c2d9f9daac

Changes: https://git.openjdk.org/jdk21/pull/38/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21&pr=38&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309957
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk21/pull/38.diff
  Fetch: git fetch https://git.openjdk.org/jdk21.git pull/38/head:pull/38

PR: https://git.openjdk.org/jdk21/pull/38