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GH-35018: [CI][Java][C++] Use ARROW_ZSTD_USE_SHARED=OFF for LLVM (#35023)

### Rationale for this change

LLVM may use Zstandard. For example `llvm@ 15` in Homebrew uses Zstandard. LLVM finds
Zstandared by itself. So libzstd.dylib may be used even when `ARROW_ZSTD_USE_SHARED` is `OFF`.

### What changes are included in this PR?

This change adjusts Zstandared used by LLVM to reflect `ARROW_ZSTD_USE_SHARED`.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Yes.
* Closes: #35018

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>