Need an address alignment utility function in cudf

[hyperbolic2346]

As found in review of code, there are alignment functions scattered around. We should have a single device-accessible alignment function that everything uses instead of doing the bit operations themselves or having a static local function for it.

Originally posted by @etseidl in https://github.com/rapidsai/cudf/pull/11403#discussion_r938132622

[bdice]

@hyperbolic2346 To make this issue more actionable, can you add links to a few of the places where these various alignment functions are defined or called?

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