[jdk17] RFR: JDK-8269426: Move tests from test/jdk/java/lang/invoke/t8150782 to its parent directory

[Mandy Chung]

`test/jdk/java/lang/invoke/t8150782` is the only one using that convention. There are several tests under `<bugid>` directory.  As the tests under `test/jdk/java/lang/invoke/t8150782` are mostly unit tests for `Lookup::accessClass` and `Lookup::findClass`, they can simply be moved to the parent directory.

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Commit messages:
 - JDK-8269426:  Move tests from test/jdk/java/lang/invoke/t8150782 to its parent directory

Changes: https://git.openjdk.java.net/jdk17/pull/162/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=162&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269426
  Stats: 9 lines in 6 files changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/162.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/162/head:pull/162

PR: https://git.openjdk.java.net/jdk17/pull/162