GH-709, GH-684, GH-641 Upgrade AWS dependency

Refactor and simplify AWSLambdaUtils to work with AWS serialization libraries
Add support for API v2 gateway event

Resolves #709
Resolves #684
Resolves #641

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/RSocketAutoConfigurationTests.java

@@ -601,6 +601,7 @@ public class RSocketAutoConfigurationTests {
 			return v -> v + v;
 		}
 
+
 		@Bean
 		public Function<String, String> echo() {
 			return v -> v;