Add support for PEP-735 dependency groups. #3145

Job	Run time
Check GitHub Organization	1s
tox -e py313-pip24_3_1	13m 41s
./dtox.sh -e py27-pip20	9m 22s
tox -e format-check,lint-check,typecheck,vendor-check,package,docs	8m 52s
tox -e py313-pip24_3_1-integration --shard 1/2	31m 27s
./dtox.sh -e py38-pip22_3_1	18m 51s
tox -e py313-pip24_3_1-integration --shard 2/2	26m 5s
./dtox.sh -e py311-pip23_3_2	18m 45s
./dtox.sh -e py313-pip24_3_1	15m 12s
./dtox.sh -e py314-pip24_3_1	15m 12s
./dtox.sh -e pypy310-pip24_3_1	28m 5s
./dtox.sh -e py27-pip20-integration	28m 44s
./dtox.sh -e py38-pip22_3_1-integration --shard 1/2	27m 48s
./dtox.sh -e py38-pip22_3_1-integration --shard 2/2	29m 0s
./dtox.sh -e py311-pip23_3_2-integration --shard 1/2	27m 34s
./dtox.sh -e py311-pip23_3_2-integration --shard 2/2	29m 21s
./dtox.sh -e py313-pip24_3_1-integration --shard 1/2	25m 32s
./dtox.sh -e py313-pip24_3_1-integration --shard 2/2	26m 51s
./dtox.sh -e py314-pip24_3_1-integration --shard 1/2	23m 52s
./dtox.sh -e py314-pip24_3_1-integration --shard 2/2	27m 29s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 1/2	45m 15s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 2/2	51m 50s
Gather Final Status	1s
	8h 48m 50s

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