Aggregate byte types internally with i64 offsets

[maxburke]

and downcast back to i32-offset-types as necessary.

Which issue does this PR close?

Closes #23694 (and possibly apache/datafusion-comet#4718)

Rationale for this change

Fixes an error when grouping on large string/binary data

What changes are included in this PR?

Inner core groups using i64 offsets and then downcasts to correct type when emitting batch slices

Are these changes tested?

Yes

Are there any user-facing changes?

No

[codecov-commenter]

Codecov Report

❌ Patch coverage is 90.09901% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.67%. Comparing base (67947b6) to head (ed48d69).

Files with missing lines	Patch %	Lines
...hysical-plan/src/aggregates/grouped_hash_stream.rs	89.09%	3 Missing and 3 partials ⚠️
datafusion/physical-plan/src/aggregates/mod.rs	92.00%	0 Missing and 6 partials ⚠️
...plan/src/aggregates/aggregate_hash_table/common.rs	73.33%	0 Missing and 4 partials ⚠️
.../aggregates/aggregate_hash_table/common_ordered.rs	57.14%	0 Missing and 3 partials ⚠️
...rc/aggregates/group_values/multi_group_by/bytes.rs	97.67%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #23695   +/-   ##
=======================================
  Coverage   80.67%   80.67%           
=======================================
  Files        1088     1088           
  Lines      367591   367673   +82     
  Branches   367591   367673   +82     
=======================================
+ Hits       296563   296636   +73     
- Misses      53374    53375    +1     
- Partials    17654    17662    +8     

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