Return a single results object instead of always a list - IonQ #19902

Job	Run time
Packaging test	1m 31s
Misc check	8s
Lint check	2m 35s
Format check	20s
Doc test	1m 28s
Changed files test	3m 49s
Shell check	10s
Notebook formatting	11s
Build protos	15s
Type check	1m 16s
Coverage check	20m 42s
Check consistency of requirements	22s
Isolated pytest Ubuntu	8m 26s
Pytest Ubuntu (3.11)	10m 41s
Pytest Ubuntu (3.12)	11m 0s
Pytest Ubuntu (3.13)	9m 30s
Pytest MacOS (3.11)	14m 51s
Typescript tests	34s
Pytest MacOS (3.12)	8m 50s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	53s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	54s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	52s
Notebook Tests against PR	10m 0s
Pytest Windows (3.13)	18m 13s
Typescript tests coverage	46s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	51s
Pytest Windows (3.11)	9m 3s
Pytest Windows (3.12)	10m 51s
Bundle file consistency	31s
Pytest MacOS (3.13)	14m 20s
Typescript lint check	30s
	2h 44m 23s

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