[C++][Compute] GroupBy: support more than 2^32 groups

[asfimport]

Support:
a) 64-bit hash,
b) 64-bit group id and
c) 64-bit hash table key offsets
in hash group by.

Reporter: Michal Nowakiewicz / @michalursa

Related issues:

• [C++] Query engine umbrella issue (is a child of)

_{Note: This issue was originally created as ARROW-12727. Please see the migration documentation for further details.}

[github-actions]

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