Add classical simulator #13067

Job	Run time
Type check	2m 30s
Misc check	6s
Format check	19s
Build docs	19s
Changed files test	2m 32s
Coverage check	8m 3s
Build protos	22s
Doc test	3m 17s
Isolated pytest Ubuntu	8m 3s
Lint check	2m 39s
Pytest MacOS (3.7)	2m 46s
Pytest MacOS (3.8)	3m 6s
Pytest MacOS (3.9)	3m 7s
Pytest MacOS (3.10)	1m 33s
Notebook formatting	15s
Notebook Tests against PR	8m 3s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	33s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	33s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	28s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	35s
Packaging test	1m 23s
Check consistency of requirements	30s
Pytest Ubuntu (3.7)	8m 2s
Pytest Ubuntu (3.8)	8m 3s
Pytest Ubuntu (3.9)	8m 2s
Pytest Ubuntu (3.10)	8m 3s
Shell check	18s
Bundle file consistency	1m 1s
Pytest Windows (3.7)	8m 4s
Pytest Windows (3.8)	8m 1s
Pytest Windows (3.9)	8m 1s
Pytest Windows (3.10)	8m 5s
Typescript tests coverage	50s
Typescript lint check	41s
Typescript tests	51s
	1h 59m 4s

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