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GH-42017: [CI][Python][C++] Fix utf8proc detection for wheel on Windows (#42022)

### Rationale for this change

utf8proc in vcpkg provides CMake package. If we use it, we don't need to care about static library name (`utf8proc.lib` or `utf8proc_static.lib`).

### What changes are included in this PR?

Use `unofficial-utf8proc` CMake package with vcpkg.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* GitHub Issue: #42017

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