Use @⁠Autowired EntityManager in Jupiter JPA tests

Switching from @⁠PersistenceContext to @⁠Autowired for dependency
injection in tests allows such tests to participate in AOT processing.

Note, however, that we still have TestNG-based tests that use
@⁠PersistenceContext — for example, AbstractEjbTxDaoTestNGTests.

See gh-29122
See gh-31442
See gh-33414

spring-test/src/test/java/org/springframework/test/context/orm/jpa/JpaEntityListenerTests.java

@@ -19,7 +19,6 @@ package org.springframework.test.context.orm.jpa;
 import java.util.List;
 
 import jakarta.persistence.EntityManager;
-import jakarta.persistence.PersistenceContext;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -48,7 +47,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @Sql(statements = "insert into person(id, name) values(0, 'Jane')")
 class JpaEntityListenerTests {
 
-	@PersistenceContext
+	@Autowired
 	EntityManager entityManager;
 
 	@Autowired

spring-test/src/test/java/org/springframework/test/context/orm/jpa/JpaPersonRepositoryTests.java

@@ -17,7 +17,6 @@
 package org.springframework.test.context.orm.jpa;
 
 import jakarta.persistence.EntityManager;
-import jakarta.persistence.PersistenceContext;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
@@ -44,7 +43,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @Sql(statements = "insert into person(id, name) values(0, 'Jane')")
 class JpaPersonRepositoryTests {
 
-	@PersistenceContext
+	@Autowired
 	EntityManager em;
 
 	@Autowired