GH-34041: [Python] Missing docstring for columns parameter of pyarrow.lib.Table.drop

[vibhatha]

This PR adds the missing documentation.
Doesn't include new test cases.

• Closes: [Python] Missing docstring for columns parameter of pyarrow.lib.Table.drop #34041

[github-actions]

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See also:

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[github-actions]

• Closes: [Python] Missing docstring for columns parameter of pyarrow.lib.Table.drop #34041

[vibhatha]

cc @pitrou @AlenkaF appreciate your reviews.

[kou]

Duplicated? #34038

[jorisvandenbossche]

@vibhatha thanks for the PR! Unfortunately there was some duplication, so I am going to close this in favor of #34038