Support for pre-generated CGLIB proxy classes (in AOT scenarios)

Includes runtime storing of generated classes to a directory specified by the "cglib.generatedClasses" system property. Avoids lazy CGLIB fast-class generation and replaces generated Enhancer and MethodWrapper key classes with equivalent record types. Introduces support for early type determination in InstantiationStrategy, AopProxy and SmartInstantiationAwareBeanPostProcessor - in order to trigger CGLIB class generation in refreshForAotProcessing (through early determineBeanType calls for bean definitions).

Closes gh-28115

spring-web/src/testFixtures/java/org/springframework/web/testfixture/method/ResolvableMethod.java

@@ -659,6 +659,7 @@ public class ResolvableMethod {
 			enhancer.setSuperclass(type);
 			enhancer.setInterfaces(new Class<?>[] {Supplier.class});
 			enhancer.setNamingPolicy(SpringNamingPolicy.INSTANCE);
+			enhancer.setAttemptLoad(true);
 			enhancer.setCallbackType(org.springframework.cglib.proxy.MethodInterceptor.class);
 
 			Class<?> proxyClass = enhancer.createClass();