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GH-42045: [Java] Update Unit Tests for Flight Module (#42158)



### Rationale for this change

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

### What changes are included in this PR?

- **common** for all module
  - Step 1. Replacing `org.junit` with `org.junit.jupiter.api`
  - Step 2. Updating `Assertions.assertXXX` to `assertXXX` using static imports
- `flight-core`
  - [x] Updating common
  - [x] Updating annotations
  - [x] Doing self review
- `flight-integration-tests` - nothing to change
- `flight-sql`
  - [x] Updating common 
  - [x] Doing self review
- `flight-sql-jdbc-core`
  - [x] Updating common
  - [x] Updating annotations
    - Adding annotations different from before:
      - `ErrorCollection`
      - `TestRule` for `FlightServerTestExtension` and `RootAllocatorExtension`
      - `ExpectedException`
  - [x] Doing self review
- `flight-sql-jdbc-driver`
  - [x] Updating common
  - [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: #42045

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