EXP: [Python] Use DeprecationWarning instead of FutureWarning

[tadeja]

Rationale for this change

Prototype for follow-up discussion in #49232

What changes are included in this PR?

Test approach of DeprecationWarning in place of current FutureWarning
Additionally corrected notes like deprecated as of 24.0.0 to 25.0.0 instead

Are these changes tested?

Yes, successful on my CI fork ( macOS segmentation fault is also seen on main the last few runs )

Are there any user-facing changes?

Yes...

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