Upgrade to H2 2.1.210

H2 2.x contains several important changes such as moving the primary key
generation mechanism to a sequence-based identifier. This commit fixes
a number of tests that were failing.

Closes gh-29651

Co-authored-by: Andy Wilkinson <wilkinsona@vmware.com>

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -399,7 +399,7 @@ bom {
 			]
 		}
 	}
-	library("H2", "1.4.200") {
+	library("H2", "2.1.210") {
 		group("com.h2database") {
 			modules = [
 				"h2"