An unwanted side-effect of the changes made in c6bdd136 to fix
gh-7271 is that a mock produced by a factory bean is not reset. To
allow such a mock to be reset without regressing the fix we now call
getBean(…) as we did before c6bdd136, however the call is now
performed in a defensive manner falling back to getSingleton(…) when
it fails.
Closes gh-33830