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GH-36756: [CI][Python] Install Cython < 3.0 on verify-release-candidate script (#36757)

### Rationale for this change

Some of our verification tasks fail for 13.0.0

### What changes are included in this PR?

Pin Cython to be less than 3.0

### Are these changes tested?

Archery

### Are there any user-facing changes?

No
* Closes: #36756

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>