RFR: 8378111: Migrate java/util/jar tests to JUnit

[Justin Lu]

This PR migrates the java/util/jar tests to use _JUnit_.

https://github.com/openjdk/jdk/commit/afe0aeee746bccbbe4bc6c9a8cd2302228ecc2f6 includes changes for _testNG_ based tests.
https://github.com/openjdk/jdk/commit/c5a7f75840f96fa77ec3ed7faa713990adb84de6 includes changes for `main` based tests.

Before: Framework-based tests: 125 = 125 TestNG + 0 JUnit.
After: Framework-based tests: 174 = 0 TestNG + 174 JUnit

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Commit messages:
 - main -> JUnit
 - TestNG -> JUnit

Changes: https://git.openjdk.org/jdk/pull/29828/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29828&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378111
  Stats: 917 lines in 33 files changed: 283 ins; 169 del; 465 mod
  Patch: https://git.openjdk.org/jdk/pull/29828.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29828/head:pull/29828

PR: https://git.openjdk.org/jdk/pull/29828