Perform NullAway build-time checks in more modules

This commit enables null-safety build-time checks in:
 - spring-jdbc
 - spring-r2dbc
 - spring-orm
 - spring-beans
 - spring-aop

See gh-32475

spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateJdbcException.java

@@ -42,6 +42,7 @@ public class HibernateJdbcException extends UncategorizedDataAccessException {
 	/**
 	 * Return the underlying SQLException.
 	 */
+	@SuppressWarnings("NullAway")
 	public SQLException getSQLException() {
 		return ((JDBCException) getCause()).getSQLException();
 	}
@@ -50,6 +51,7 @@ public class HibernateJdbcException extends UncategorizedDataAccessException {
 	 * Return the SQL that led to the problem.
 	 */
 	@Nullable
+	@SuppressWarnings("NullAway")
 	public String getSql() {
 		return ((JDBCException) getCause()).getSQL();
 	}

spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateQueryException.java

@@ -40,6 +40,7 @@ public class HibernateQueryException extends InvalidDataAccessResourceUsageExcep
 	 * Return the HQL query string that was invalid.
 	 */
 	@Nullable
+	@SuppressWarnings("NullAway")
 	public String getQueryString() {
 		return ((QueryException) getCause()).getQueryString();
 	}

spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateTemplate.java

@@ -947,6 +947,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 
 	@Deprecated
 	@Override
+	@SuppressWarnings("NullAway")
 	public List<?> findByNamedQueryAndNamedParam(
 			String queryName, @Nullable String[] paramNames, @Nullable Object[] values)
 			throws DataAccessException {

spring-orm/src/main/java/org/springframework/orm/jpa/AbstractEntityManagerFactoryBean.java

@@ -427,7 +427,7 @@ public abstract class AbstractEntityManagerFactoryBean implements
 				if (cause != null) {
 					String message = ex.getMessage();
 					String causeString = cause.toString();
-					if (!message.endsWith(causeString)) {
+					if (message != null && !message.endsWith(causeString)) {
 						ex = new PersistenceException(message + "; nested exception is " + causeString, cause);
 					}
 				}

spring-orm/src/main/java/org/springframework/orm/jpa/LocalContainerEntityManagerFactoryBean.java

@@ -349,7 +349,7 @@ public class LocalContainerEntityManagerFactoryBean extends AbstractEntityManage
 	@Override
 	public void afterPropertiesSet() throws PersistenceException {
 		PersistenceUnitManager managerToUse = this.persistenceUnitManager;
-		if (this.persistenceUnitManager == null) {
+		if (managerToUse == null) {
 			this.internalPersistenceUnitManager.afterPropertiesSet();
 			managerToUse = this.internalPersistenceUnitManager;
 		}

spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java

@@ -452,6 +452,7 @@ public class DefaultPersistenceUnitManager
 	 * @see #obtainDefaultPersistenceUnitInfo()
 	 * @see #obtainPersistenceUnitInfo(String)
 	 */
+	@SuppressWarnings("NullAway")
 	public void preparePersistenceUnitInfos() {
 		this.persistenceUnitInfoNames.clear();
 		this.persistenceUnitInfos.clear();

spring-orm/src/main/java/org/springframework/orm/jpa/support/PersistenceAnnotationBeanPostProcessor.java

@@ -359,6 +359,7 @@ public class PersistenceAnnotationBeanPostProcessor implements InstantiationAwar
 	}
 
 	@Override
+	@Nullable
 	public BeanRegistrationAotContribution processAheadOfTime(RegisteredBean registeredBean) {
 		Class<?> beanClass = registeredBean.getBeanClass();
 		String beanName = registeredBean.getBeanName();
@@ -857,6 +858,7 @@ public class PersistenceAnnotationBeanPostProcessor implements InstantiationAwar
 			return CodeBlock.of("$L($L)", generatedMethod.getName(), REGISTERED_BEAN_PARAMETER);
 		}
 
+		@SuppressWarnings("NullAway")
 		private void generateGetEntityManagerMethod(MethodSpec.Builder method, PersistenceElement injectedElement) {
 			String unitName = injectedElement.unitName;
 			Properties properties = injectedElement.properties;

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/Target_BytecodeProvider.java

@@ -36,6 +36,7 @@ import org.hibernate.property.access.spi.PropertyAccess;
 final class Target_BytecodeProvider {
 
 	@Substitute
+	@SuppressWarnings("NullAway")
 	public ReflectionOptimizer getReflectionOptimizer(Class<?> clazz, Map<String, PropertyAccess> propertyAccessMap) {
 		return null;
 	}

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/Target_BytecodeProviderInitiator.java

@@ -36,6 +36,7 @@ import org.hibernate.bytecode.spi.BytecodeProvider;
 final class Target_BytecodeProviderInitiator {
 
 	@Alias
+	@SuppressWarnings("NullAway")
 	public static String BYTECODE_PROVIDER_NAME_NONE;
 
 	@Alias