Add some missing types to `PythonIdentity`. #3331

Job	Run time
Check GitHub Organization	1s
tox -e format-check,lint-check,typecheck,enum-check,vendor-check,package,docs	11m 25s
tox -e py313-pip24_3_1	19m 46s
tox -e py313-pip24_3_1-integration --shard 1/2	31m 3s
./dtox.sh -e py27-pip20	9m 32s
tox -e py313-pip24_3_1-integration --shard 2/2	38m 55s
./dtox.sh -e py38-pip22_3_1	16m 54s
./dtox.sh -e py311-pip23_3_2	17m 52s
./dtox.sh -e py313-pip24_3_1	12m 43s
./dtox.sh -e py314-pip24_3_1	13m 15s
./dtox.sh -e pypy310-pip24_3_1	27m 51s
./dtox.sh -e py27-pip20-integration	29m 3s
./dtox.sh -e py38-pip22_3_1-integration --shard 1/2	28m 57s
./dtox.sh -e py38-pip22_3_1-integration --shard 2/2	28m 24s
./dtox.sh -e py311-pip23_3_2-integration --shard 1/2	27m 45s
./dtox.sh -e py311-pip23_3_2-integration --shard 2/2	27m 4s
./dtox.sh -e py313-pip24_3_1-integration --shard 1/2	25m 27s
./dtox.sh -e py313-pip24_3_1-integration --shard 2/2	25m 2s
./dtox.sh -e py314-pip24_3_1-integration --shard 1/2	25m 1s
./dtox.sh -e py314-pip24_3_1-integration --shard 2/2	24m 42s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 1/2	52m 2s
./dtox.sh -e pypy310-pip24_3_1-integration --shard 2/2	49m 55s
Gather Final Status	1s
	9h 2m 40s

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