Allow importing SamplerV1 and EstimatorV1 (#1477) (#1478)

Right now, users can't import `qiskit_ibm_runtime.SamplerV1` and `qiskit_ibm_runtime.EstimatorV1` because we only expose the aliases `Sampler` and `Estimator`. That gets in the way of users being explicit about which primitive version they're using.

This also is resulting in the API docs not including the pages for both the V1 and V2 primitives in Qiskit/documentation#973 because we didn't tell autosummary about them.

qiskit_ibm_runtime/__init__.py

@@ -144,7 +144,11 @@
 
    QiskitRuntimeService
    Estimator
+   EstimatorV1
+   EstimatorV2
    Sampler
+   SamplerV1
+   SamplerV2
    Session
    IBMBackend
    RuntimeJob
@@ -169,8 +173,16 @@
 from .utils.utils import setup_logger
 from .version import __version__
 
-from .estimator import EstimatorV2, EstimatorV1 as Estimator
-from .sampler import SamplerV2, SamplerV1 as Sampler
+from .estimator import (  # pylint: disable=reimported
+    EstimatorV2,
+    EstimatorV1,
+    EstimatorV1 as Estimator,
+)
+from .sampler import (  # pylint: disable=reimported
+    SamplerV2,
+    SamplerV1,
+    SamplerV1 as Sampler,
+)
 from .options import Options, EstimatorOptions, SamplerOptions
 
 # Setup the logger for the IBM Quantum Provider package.