Harmonize hint registration

Previously, a shortcut method for the default ExecutableMode was
provided, but we found out that the shortcut makes it harder to
determine the intent.

This commit harmonizes hints registration for types, methods, and
fields. An ExecutableMode is now mandatory to register a method or
constructor. Previous methods that infer a mode or provided a
customizer of the builder are deprecated.

Closes gh-29135

spring-orm/src/main/java/org/springframework/orm/jpa/support/InjectionCodeGenerator.java

@@ -21,6 +21,7 @@ import java.lang.reflect.Member;
 import java.lang.reflect.Method;
 
 import org.springframework.aot.generate.AccessVisibility;
+import org.springframework.aot.hint.ExecutableMode;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.javapoet.CodeBlock;
 import org.springframework.util.Assert;
@@ -97,7 +98,7 @@ class InjectionCodeGenerator {
 		AccessVisibility visibility = AccessVisibility.forMember(method);
 		if (visibility == AccessVisibility.PRIVATE
 				|| visibility == AccessVisibility.PROTECTED) {
-			this.hints.reflection().registerMethod(method);
+			this.hints.reflection().registerMethod(method, ExecutableMode.INVOKE);
 			code.addStatement("$T method = $T.findMethod($T.class, $S, $T.class)",
 					Method.class, ReflectionUtils.class, method.getDeclaringClass(),
 					method.getName(), method.getParameterTypes()[0]);