Add InternalTag to support non-public tags #17003

Job	Run time
Coverage check	11m 21s
Build protos	14s
Changed files test	1m 5s
Format check	16s
Isolated pytest Ubuntu	8m 15s
Lint check	4m 28s
Doc test	1m 28s
Pytest MacOS (3.10)	8m 55s
Type check	1m 28s
Notebook formatting	9s
Notebook Tests against PR	10m 6s
Pytest MacOS (3.11)	10m 2s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	43s
Pytest MacOS (3.12)	18m 59s
Packaging test	1m 14s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	46s
Check consistency of requirements	17s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	1m 14s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	44s
Pytest Ubuntu (3.10)	6m 2s
Misc check	4s
Pytest Ubuntu (3.11)	6m 2s
Pytest Ubuntu with NumPy-2 (3.10)	6m 22s
Pytest Ubuntu (3.12)	8m 17s
Shell check	6s
Pytest Ubuntu with NumPy-2 (3.11)	5m 36s
Bundle file consistency	42s
Pytest Ubuntu with NumPy-2 (3.12)	6m 18s
Pytest Ubuntu with NumPy-2 (3.13)	6m 5s
Typescript tests coverage	37s
Typescript tests	43s
Typescript lint check	38s
Pytest Windows (3.10)	9m 3s
Pytest Windows (3.11)	11m 5s
Pytest Windows (3.12)	10m 46s
	2h 40m 10s

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