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GH-44368: [C++] Use "lib" for generating bundled dependencies even with "clang-cl" (#44391)

### Rationale for this change

We need to use "clang-cl" for Windows ARM64. We can use MSVC tool such as "lib" for generating bundled dependencies with "clang-cl" build because it's a MSVC like build.

### What changes are included in this PR?

Prefer "lib" to `${CMAKE_AR}` with "clang-cl" for generating bundled dependencies. It seems that `${CMAKE_AR}` doesn't generate `arrow_bundled_dependencies.lib`.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

Yes.
* GitHub Issue: #44368

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