Commit 47f88e123f introduced support for invoking init/destroy/SpEL
methods via public types whenever possible. To achieve that,
getInterfaceMethodIfPossible() was modified so that it only returned
interface methods from public interfaces; however, we have learned that
third parties relied on the previous behavior which found any interface
method (even in non-public interfaces).
In light of the above, this commit partially reverts commit 47f88e123f
in order to reinstate getInterfaceMethodIfPossible() in non-deprecated
form with its previous behavior.
See gh-33216
ba774c6290