[SNOW-1748174]: Add support for `size` in `groupby.agg` #12248

Job	Run time
Type Checking	35s
Check linting	2m 4s
Build Wheel File	9s
Build Doc	3m 58s
Test Enable CTE Optimization py-ubuntu-latest-64-cores-3.9-aws	7m 44s
Test py-macos-latest-3.9-aws	9m 7s
Test modin-macos-latest-3.9-aws	22m 18s
Test py-windows-latest-64-cores-3.11-gcp	20m 53s
Test Local Testing Module py-macos-latest-3.8	9m 40s
Test modin-windows-latest-64-cores-3.11-gcp	51m 15s
Test modin extra without pandas extra py-macos-3.9-aws.	1m 30s
Test py-ubuntu-latest-64-cores-3.9-aws	7m 46s
Test modin-ubuntu-latest-64-cores-3.9-aws	28m 18s
Test Local Testing Module py-macos-latest-3.9	10m 48s
Test py-ubuntu-latest-64-cores-3.10-azure	7m 30s
Test Local Testing Module py-macos-latest-3.10	9m 52s
Test modin-ubuntu-latest-64-cores-3.10-azure	21m 36s
Test Local Testing Module py-macos-latest-3.11	13m 7s
Test Snowpandas Multithreading py-ubuntu-latest-64-cores-3.9-aws	2m 45s
Test Local Testing Module py-windows-latest-3.8	6m 58s
Test Snowpark Multithreading py-ubuntu-latest-64-cores-3.9-aws	9m 43s
Test Local Testing Module py-windows-latest-3.9	7m 14s
Test Local Testing Module py-windows-latest-3.10	7m 17s
Test Local Testing Module py-windows-latest-3.11	7m 47s
Test Local Testing Module py-ubuntu-latest-3.8	8m 7s
Test Local Testing Module py-ubuntu-latest-3.9	7m 52s
Test Local Testing Module py-ubuntu-latest-3.10	8m 13s
Test Local Testing Module py-ubuntu-latest-3.11	7m 52s
Combine coverage	1m 36s
	5h 3m 34s

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