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GH-42164: [Java] Update Unit Tests for Gandiva Module (#42166)



### Rationale for this change

Update package from JUnit 4(`org.junit`) to JUnit 5(`org.junit.jupiter`).

### What changes are included in this PR?

- [x] Replacing `org.junit` with `org.junit.jupiter.api`
- [x] Updating `Assertions.assertXXX` to `assertXXX` using static imports
- [x] Updating annotations
- [x] Doing self review

### Are these changes tested?

Yes, existing tests have passed.

### Are there any user-facing changes?

No.

* GitHub Issue: #42164

Authored-by: Hyunseok Seo <hsseo0501@gmail.com>
Signed-off-by: David Li <li.davidm96@gmail.com>