Upgrade dependencies; prepare for release

* Upgrade to Gradle `7.3.3`
* Upgrade to the latest milestones for releasing
* Upgrade to Kryo-5.2.1 and update source code according breaking changes
* Upgrade to H2-2.1.210 and re-enable respective stored procedure tests

spring-integration-http/src/test/java/org/springframework/integration/http/outbound/CookieTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -117,6 +117,7 @@ public class CookieTests {
 				}
 
 				@Override
+				@Deprecated
 				public String getMethodValue() {
 					return null;
 				}