Upgrade to Hibernate 6.1.1.Final

This commit makes the following potentially breaking changes:

- Dependency management for modules that do not exist in Hibernate
  6.1 has been removed.
- Hibernate's modules are now in the org.hibernate.orm group. Users
  not using the starter or using modules that are not in the starter
  will have to update their build configuration accordingly.
- spring.jpa.hibernate.use-new-id-generator-mappings has been removed
  as Hibernate no longer supports switching back to the old ID
  generator mappings.

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

Closes gh-31674

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jpa/build.gradle

@@ -10,12 +10,7 @@ dependencies {
 	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-web"))
 	implementation("jakarta.persistence:jakarta.persistence-api")
 	implementation("jakarta.xml.bind:jakarta.xml.bind-api")
-	implementation("org.hibernate:hibernate-core-jakarta") {
-		exclude group: "javax.activation", module: "javax.activation-api"
-		exclude group: "javax.persistence", module: "javax.persistence-api"
-		exclude group: "javax.xml.bind", module: "jaxb-api"
-		exclude group: "org.jboss.spec.javax.transaction", module: "jboss-transaction-api_1.2_spec"
-	}
+	implementation("org.hibernate.orm:hibernate-core")
 	implementation("org.springframework:spring-orm")
 
 	runtimeOnly("com.h2database:h2")