Avoid synchronization in AbstractAspectJAdvice#calculateArgumentBindings

Aligned with the early calculateArgumentBindings call in ReflectiveAspectJAdvisorFactory.

Closes gh-26377

spring-aop/src/main/java/org/springframework/aop/aspectj/AbstractAspectJAdvice.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -368,7 +368,7 @@ private static boolean isVariableName(String name) {
 	 * to which argument name. There are multiple strategies for determining
 	 * this binding, which are arranged in a ChainOfResponsibility.
 	 */
-	public final synchronized void calculateArgumentBindings() {
+	public final void calculateArgumentBindings() {
 		// The simple case... nothing to bind.
 		if (this.argumentsIntrospected || this.parameterTypes.length == 0) {
 			return;