python: Allow users to set nativeInstallCheckInputs and installCheckInputs (#439663)

      # Python packages don't have a checkPhase, only an installCheckPhase

      doCheck = false;

      doInstallCheck = attrs.doCheck or true;

      nativeInstallCheckInputs = nativeCheckInputs;

      installCheckInputs = checkInputs;

      nativeInstallCheckInputs = nativeCheckInputs ++ attrs.nativeInstallCheckInputs or [ ];

      installCheckInputs = checkInputs ++ attrs.installCheckInputs or [ ];

      inherit dontWrapPythonPrograms;