Merge pull request #42395 from sebastian-philipp/cephadm-improve-no-enigne-msg

cephadm: Clarify no container engine message

Reviewed-by: Adam King <adking@redhat.com>
Reviewed-by: Dimitri Savineau <dsavinea@redhat.com>
Reviewed-by: Kefu Chai <kchai@redhat.com>

diff --cc src/cephadm/cephadm
index fd70c03b33e0c9c72c73b610bc0f5d67106351bc,fb63399e65663abcdbd6f4f0bc9e65d85ad14155..9ffdb3358b514f84656bea99bc9f46aa7146bc91
--- 1/src/cephadm/cephadm
--- 2/src/cephadm/cephadm
+++ b/src/cephadm/cephadm
@@@ -168,11 -164,12 +168,12 @@@ class CephadmContext
  
  
  class ContainerEngine:
 -    def __init__(self):
 +    def __init__(self) -> None:
          self.path = find_program(self.EXE)
  
+     @classmethod
      @property
-     def EXE(self) -> str:
+     def EXE(cls) -> str:
          raise NotImplementedError()