GH-46500: [CI][Java] Remove CI scripts for Java (#46502)

### Rationale for this change

Apache Arrow Java have been separated repository.
CI scripts for Java are unnecessary.

### What changes are included in this PR?

Remove CI scripts for Java (Except JNI)

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.

* GitHub Issue: #46500

Authored-by: Hiroyuki Sato <[email protected]>
Signed-off-by: Sutou Kouhei <[email protected]>

Author: hiroyuki-sato