Introduce @⁠EasyMockBean bean override example

This commit introduces example support for a custom @⁠EasyMockBean
annotation that allows tests to use EasyMock as the mocking framework
for bean overrides in a test's ApplicationContext.

The point of this exercise is to ensure that it is possible for third
parties to introduce bean override support for mocking frameworks other
than Mockito, and that they can do so with the APIs currently in place.

Closes gh-33562

framework-platform/framework-platform.gradle

@@ -115,6 +115,7 @@ dependencies {
 		api("org.codehaus.jettison:jettison:1.5.4")
 		api("org.crac:crac:1.4.0")
 		api("org.dom4j:dom4j:2.1.4")
+		api("org.easymock:easymock:5.4.0")
 		api("org.eclipse.jetty:jetty-reactive-httpclient:4.0.7")
 		api("org.eclipse.persistence:org.eclipse.persistence.jpa:3.0.4")
 		api("org.eclipse:yasson:2.0.4")