[bugfix] Prevent GateOperation.add from superseding Circuit.radd #19905

Job	Run time
Packaging test	1m 20s
Type check	1m 21s
Misc check	5s
Format check	20s
Changed files test	2m 26s
Lint check	2m 35s
Isolated pytest Ubuntu	8m 29s
Doc test	1m 36s
Coverage check	21m 46s
Bundle file consistency	37s
Typescript tests	33s
Pytest MacOS (3.11)	13m 49s
Pytest MacOS (3.13)	9m 52s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	56s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	59s
Pytest MacOS (3.12)	12m 38s
Notebook Tests against PR	9m 48s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	49s
Check consistency of requirements	22s
Notebook formatting	10s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	1m 4s
Pytest Ubuntu (3.13)	9m 17s
Pytest Ubuntu (3.11)	8m 36s
Typescript tests coverage	36s
Pytest Ubuntu (3.12)	10m 40s
Pytest Windows (3.12)	9m 6s
Pytest Windows (3.13)	18m 2s
Pytest Windows (3.11)	9m 17s
Typescript lint check	30s
Build protos	18s
Shell check	7s
	2h 38m 4s

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