Commits on May 30, 2023

1. Fix PassManagerConfig.from_backend with BackendV1 and no CouplingMap (#… …

   …10172)
   
   * Fix PassManagerConfig.from_backend with BackendV1 and no CouplingMap
   
   This commit fixes an issue in the PassManagerConfig.from_backend
   constructor method when using BackendV1 based simulator backends. The
   pass was incorrectly handling the case when the backend configuration
   didn't have a coupling map defined and incorrectly creating a coupling
   map with 0 qubits instead of using None to indicate the lack of
   connectivity. This has been fixed so the coupling map creation is
   skipped if there is no coupling map attribute in the backend's
   configuration.
   
   Fixes #10171
   
   * Fix tests
   
   (cherry picked from commit 4762e26)

   

   mtreinish authored and mergify[bot] committed May 30, 2023
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