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GH-43175: [C++] Skip not Emscripten ready tests in CSV tests (#43724)

### Rationale for this change

We can't use thread nor `%z` on Emacripten. Some CSV tests use them.

### What changes are included in this PR?

Skip CSV tests that use thread or `%z`.

### Are these changes tested?

Yes.

### Are there any user-facing changes?

No.
* GitHub Issue: #43175

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