Move aer and runtime imports in aer plugin

Author: ElePT

qiskit_neko/aer_plugin.py

@@ -20,6 +20,7 @@ class AerBackendPlugin(backend_plugin.BackendPlugin):
 
     def __init__(self):
         from qiskit_ibm_runtime.fake_provider import FakeProviderForBackendV2
+
         super().__init__()
         self.mock_provider = FakeProviderForBackendV2()
         self.mock_provider_backend_names = set()
@@ -45,6 +46,7 @@ def get_backend(self, backend_selection=None):
         :raises ValueError: If an invalid backend selection string is passed in
         """
         import qiskit_aer as aer
+
         if backend_selection is None:
             return aer.AerSimulator()
         if backend_selection.startswith("method="):