Add support for PEP-735 dependency groups. #3146

Job	Run time
Check GitHub Organization	1s
tox -e format-check,lint-check,typecheck,vendor-check,package,docs	8m 32s
tox -e py313-pip24_3_1	23m 46s
tox -e py313-pip24_3_1-integration --shard 1/2	36m 17s
./dtox.sh -e py27-pip20	10m 39s
tox -e py313-pip24_3_1-integration --shard 2/2	23m 57s
./dtox.sh -e py38-pip22_3_1	17m 44s
./dtox.sh -e py311-pip23_3_2	18m 37s
./dtox.sh -e py313-pip24_3_1	14m 7s
./dtox.sh -e py314-pip24_3_1	15m 32s
./dtox.sh -e pypy310-pip24_3_1	26m 44s
./dtox.sh -e py27-pip20-integration	27m 33s
./dtox.sh -e py38-pip22_3_1-integration --shard 1/2	27m 26s
./dtox.sh -e py38-pip22_3_1-integration --shard 2/2	28m 32s
./dtox.sh -e py311-pip23_3_2-integration --shard 1/2	27m 39s
./dtox.sh -e py311-pip23_3_2-integration --shard 2/2	28m 55s
./dtox.sh -e py313-pip24_3_1-integration --shard 1/2	26m 57s
./dtox.sh -e py313-pip24_3_1-integration --shard 2/2	26m 3s
./dtox.sh -e py314-pip24_3_1-integration --shard 1/2	23m 46s
./dtox.sh -e py314-pip24_3_1-integration --shard 2/2	28m 16s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 1/2	46m 41s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 2/2	49m 2s
Gather Final Status	1s
	8h 56m 47s

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