Use simpler argument style for V2 Sampler (Qiskit#1122)

`SamplerV2.run()` has a flexible argument style. It always needs a list,
but each element can either be a single `QuantumCircuit` or it can be a
tuple like `(my_circuit,)` or `(my_circuit, None, 123)`.

These two lines are functionally equivalent:

```python
sampler.run([circuit1, circuit2])
```

```python
sampler.run([(circuit1,), (circuit2,)])
```

But the first one is simpler and easier to understand. So, this PR
consistently switches to that style. When we do need the tuple-syntax,
we now put each tuple on a dedicated line so that it's easier to see
each distinct tuple.

docs/api/migration-guides/v2-primitives.mdx

@@ -90,12 +90,15 @@ Sampler V2 example that uses shots in `run()`:
 
 ```python
 # Sample two circuits at 128 shots each.
-sampler.run([(circuit1,), (circuit2,)], shots=128)
+sampler.run([circuit1, circuit2], shots=128)
 
-# Sample two circuits at different amounts of shots. The "None"s are necessary
-# as placeholders
+# Sample two circuits at different amounts of shots.
+# The "None"s are necessary as placeholders
 # for the lack of parameter values in this example.
-sampler.run([(circuit1, None, 123), (circuit2, None, 456)])
+sampler.run([
+  (circuit1, None, 123),
+  (circuit2, None, 456),
+])
 ```
 
 #### Output
@@ -226,7 +229,7 @@ pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
 isa_circuit = pm.run(circuit)
 
 sampler = Sampler(backend)
-job = sampler.run([(isa_circuit,)])
+job = sampler.run([isa_circuit])
 result = job.result()
 # Get results for the first (and only) PUB
 pub_result = result[0]
@@ -886,7 +889,7 @@ pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
 isa_circuit = pm.run(circuit)
 
 sampler = Sampler(backend)
-job = sampler.run([(isa_circuit,)])
+job = sampler.run([isa_circuit])
 result = job.result()
 ```  
   </TabItem>
@@ -1109,8 +1112,8 @@ backend = service.least_busy(operational=True, simulator=False, min_num_qubits=1
 
 with Session(service=service, backend=backend) as session: 
     sampler = Sampler(session=session) 
-    job = sampler.run([(isa_circuit)]) 
-    another_job = sampler.run([(another_isa_circuit)]) 
+    job = sampler.run([isa_circuit]) 
+    another_job = sampler.run([another_isa_circuit]) 
     result = job.result()
     another_result = another_job.result() 
 

docs/build/bit-ordering.mdx

@@ -63,7 +63,7 @@ decimal integer `2` (measured with probability `1.0`).
 from qiskit.primitives import Samplerv2 as Sampler
 qc.measure_all()
 
-job = sampler.run([(qc)])
+job = sampler.run([qc])
 result = job.result()
 print(f" > Counts: {result[0].data.meas.get_counts()}")
 ```

docs/run/advanced-runtime-options.mdx

@@ -123,7 +123,7 @@ You can pass in options by using the `run()` method. This overwrites the options
 In V2, the only options you can pass to `run()` are options defined in the interface.  That is, `shots` for Sampler and `precision` for Estimator.
 ```python
 # Sample two circuits at 128 shots each.
-sampler.run([(circuit1,), (circuit2,)], shots=128)
+sampler.run([circuit1, circuit2], shots=128)
 ```
 
   </TabItem>
@@ -162,7 +162,7 @@ sampler.options.default_shots=2000
 sampler.options.update(default_shots=1024, dynamical_decoupling={"sequence_type": "XpXm"})
 
 # Sample two circuits at 128 shots each.
-sampler.run([(circuit1,), (circuit2,)], shots=128)
+sampler.run([circuit1, circuit2], shots=128)
 ```
   </TabItem>
 

docs/run/estimate-job-run-time.mdx

@@ -61,7 +61,7 @@ isa_circuit = pm.run(qc)
 sampler = Sampler(backend)
 
 # Submit the circuit to the sampler
-job = sampler.run([(isa_circuit,)])
+job = sampler.run([isa_circuit])
 
 print(job.usage_estimation)
 ```

docs/run/primitives-examples.mdx

@@ -408,7 +408,7 @@ pm = generate_preset_pass_manager(backend=backend, optimization_level=1)
 isa_circuit = pm.run(circuit)
 
 sampler = Sampler(backend)
-job = sampler.run([(isa_circuit,)])
+job = sampler.run([isa_circuit])
 result = job.result()
 ```  
   </TabItem>
@@ -627,8 +627,8 @@ another_isa_circuit = pm.run(another_circuit)
 
 with Session(service=service, backend=backend) as session: 
     sampler = Sampler(session=session) 
-    job = sampler.run([(isa_circuit)]) 
-    another_job = sampler.run([(another_isa_circuit)]) 
+    job = sampler.run([isa_circuit]) 
+    another_job = sampler.run([another_isa_circuit]) 
     result = job.result()
     another_result = another_job.result() 
 

docs/run/primitives-get-started.mdx

@@ -205,7 +205,7 @@ For Sampler V2, the circuit and optional parameter value sets are input as *prim
   <TabItem value="SamplerV2" label="Sampler V2">
 
 ```python
-job = sampler.run([(isa_circuit)])
+job = sampler.run([isa_circuit])
 print(f">>> Job ID: {job.job_id()}")
 print(f">>> Job Status: {job.status()}")
 ```

docs/run/primitives.mdx

@@ -209,7 +209,10 @@ sampler.run([circuit1, circuit2, ...],[observable1, observable2, ...],[param_val
 Example: 
 
 ```python
-sampler.run([(circuit1, param_values1, shots1),(circuit2, param_values2, shots_2) ])
+sampler.run([
+  (circuit1, param_values1, shots1),
+  (circuit2, param_values2, shots_2),
+])
 ```
 
 ## Estimator

docs/run/quantum-serverless.mdx

@@ -166,7 +166,7 @@ target_circuit = selector.optimized_circuit
 
 # Step 3: Execute the target circuit
 sampler = Sampler(backend=backend, options={"default_shots": 1024})
-job = sampler.run([(target_circuit,)])
+job = sampler.run([target_circuit])
 result = job.result()
 
 # Step 4: Postprocess the results

docs/run/run-jobs-in-session.mdx

@@ -175,7 +175,7 @@ with Session(backend=backend):
     sampler = Sampler()
     estimator = Estimator()
 
-    job = sampler.run([(sampler_circuit,)])
+    job = sampler.run([sampler_circuit])
     result = job.result()
     print(f" > Counts: {result[0].data.meas.get_counts()}")
 

docs/start/setup-channel.mdx

@@ -101,7 +101,7 @@ service = QiskitRuntimeService()
 backend = service.backend("ibmq_qasm_simulator")
 
 sampler = Sampler(backend)
-job = sampler.run([(example_circuit,)])
+job = sampler.run([example_circuit])
 print(f"job id: {job.job_id()}")
 result = job.result()
 print(result)
@@ -173,7 +173,7 @@ print(result)
     service = QiskitRuntimeService()
     backend = service.backend("ibmq_qasm_simulator")
     sampler = Sampler(backend)
-    job = sampler.run([(example_circuit,)])
+    job = sampler.run([example_circuit])
     print(f"job id: {job.job_id()}")
     result = job.result()
     print(result)