Replace type_workarounds.NotImplementedType with types.NotImplementedType #15951

Job	Run time
Format check	12s
Type check	1m 21s
Changed files test	1m 35s
Lint check	4m 23s
Packaging test	1m 15s
Doc test	1m 53s
Build protos	14s
Coverage check	11m 19s
Isolated pytest Ubuntu	7m 52s
Notebook formatting	11s
Check consistency of requirements	25s
Pytest Ubuntu (3.10)	6m 33s
Pytest Ubuntu (3.11)	5m 53s
Pytest Ubuntu with NumPy-2 (3.10)	7m 32s
Shell check	8s
Pytest Ubuntu (3.12)	6m 18s
Pytest Ubuntu with NumPy-2 (3.11)	6m 20s
Misc check	4s
Pytest Ubuntu with NumPy-2 (3.12)	7m 1s
Pytest Windows (3.10)	17m 38s
Pytest Windows (3.11)	16m 43s
Pytest MacOS (3.10)	10m 6s
Notebook Tests against PR	10m 7s
Pytest Windows (3.12)	21m 48s
Pytest MacOS (3.11)	6m 18s
Pytest MacOS (3.12)	13m 47s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	46s
Bundle file consistency	47s
Typescript tests coverage	38s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	54s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	54s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	49s
Typescript lint check	32s
Typescript tests	43s
	2h 52m 59s

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