Support `@MockitoSpyBean` at the type level on test classes

[sbrannen]

Overview

As a followup to #33925, we should investigate the feasibility of supporting @MockitoSpyBean at the type level on test classes.

A member of the community has expressed an interest in #33925 (comment), and there are additional up-votes on the comment.

Related Issues

• Support @MockitoBean at the type level on test classes #33925

[sbrannen]

Current work on this can viewed in the following feature branch.

main...sbrannen:spring-framework:issues/gh-34408-MockitoSpyBeans

[sbrannen]

Closed via e31ce35