[SPARK-47111][SQL][TESTS][3.4] Upgrade PostgreSQL JDBC driver to 42.7.2 and docker image to 16.2

### What changes were proposed in this pull request?

This is a backport of #45191 .

This PR aims to upgrade `PostgreSQL` JDBC driver and docker images.
- JDBC Driver: `org.postgresql:postgresql` to 42.7.2
- Docker Image: `postgres` from `15.1-alpine` to `16.2-alpine`

### Why are the changes needed?

To use the latest PostgreSQL combination in the following integration tests.

- PostgresIntegrationSuite
- PostgresKrbIntegrationSuite
- v2/PostgresIntegrationSuite
- v2/PostgresNamespaceSuite

### Does this PR introduce _any_ user-facing change?

No. This is a pure test-environment update.

### How was this patch tested?

Pass the CIs.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #45900 from dongjoon-hyun/SPARK-47111-3.4.

Authored-by: Dongjoon Hyun <dhyun@apple.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

Author: dongjoon-hyun

connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala

@@ -29,17 +29,17 @@ import org.apache.spark.sql.types.{ArrayType, DecimalType, FloatType, ShortType}
 import org.apache.spark.tags.DockerTest
 
 /**
- * To run this test suite for a specific version (e.g., postgres:15.1):
+ * To run this test suite for a specific version (e.g., postgres:16.2):
  * {{{
- *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:15.1
+ *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:16.2
  *     ./build/sbt -Pdocker-integration-tests
  *     "testOnly org.apache.spark.sql.jdbc.PostgresIntegrationSuite"
  * }}}
  */
 @DockerTest
 class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
   override val db = new DatabaseOnDocker {
-    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:15.1-alpine")
+    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:16.2-alpine")
     override val env = Map(
       "POSTGRES_PASSWORD" -> "rootpass"
     )

connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresKrbIntegrationSuite.scala

@@ -25,9 +25,9 @@ import org.apache.spark.sql.execution.datasources.jdbc.connection.SecureConnecti
 import org.apache.spark.tags.DockerTest
 
 /**
- * To run this test suite for a specific version (e.g., postgres:15.1):
+ * To run this test suite for a specific version (e.g., postgres:16.2):
  * {{{
- *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:15.1
+ *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:16.2
  *     ./build/sbt -Pdocker-integration-tests "testOnly *PostgresKrbIntegrationSuite"
  * }}}
  */
@@ -37,7 +37,7 @@ class PostgresKrbIntegrationSuite extends DockerKrbJDBCIntegrationSuite {
   override protected val keytabFileName = "postgres.keytab"
 
   override val db = new DatabaseOnDocker {
-    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:15.1")
+    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:16.2")
     override val env = Map(
       "POSTGRES_PASSWORD" -> "rootpass"
     )

connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/PostgresIntegrationSuite.scala

@@ -27,17 +27,17 @@ import org.apache.spark.sql.types._
 import org.apache.spark.tags.DockerTest
 
 /**
- * To run this test suite for a specific version (e.g., postgres:15.1):
+ * To run this test suite for a specific version (e.g., postgres:16.2)
  * {{{
- *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:15.1
+ *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:16.2
  *     ./build/sbt -Pdocker-integration-tests "testOnly *v2.PostgresIntegrationSuite"
  * }}}
  */
 @DockerTest
 class PostgresIntegrationSuite extends DockerJDBCIntegrationV2Suite with V2JDBCTest {
   override val catalogName: String = "postgresql"
   override val db = new DatabaseOnDocker {
-    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:15.1-alpine")
+    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:16.2-alpine")
     override val env = Map(
       "POSTGRES_PASSWORD" -> "rootpass"
     )

connector/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/v2/PostgresNamespaceSuite.scala

@@ -26,16 +26,16 @@ import org.apache.spark.sql.util.CaseInsensitiveStringMap
 import org.apache.spark.tags.DockerTest
 
 /**
- * To run this test suite for a specific version (e.g., postgres:15.1):
+ * To run this test suite for a specific version (e.g., postgres:16.2):
  * {{{
- *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:15.1
+ *   ENABLE_DOCKER_INTEGRATION_TESTS=1 POSTGRES_DOCKER_IMAGE_NAME=postgres:16.2
  *     ./build/sbt -Pdocker-integration-tests "testOnly *v2.PostgresNamespaceSuite"
  * }}}
  */
 @DockerTest
 class PostgresNamespaceSuite extends DockerJDBCIntegrationSuite with V2JDBCNamespaceTest {
   override val db = new DatabaseOnDocker {
-    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:15.1-alpine")
+    override val imageName = sys.env.getOrElse("POSTGRES_DOCKER_IMAGE_NAME", "postgres:16.2-alpine")
     override val env = Map(
       "POSTGRES_PASSWORD" -> "rootpass"
     )

pom.xml

@@ -1239,7 +1239,7 @@
       <dependency>
         <groupId>org.postgresql</groupId>
         <artifactId>postgresql</artifactId>
-        <version>42.5.1</version>
+        <version>42.7.2</version>
         <scope>test</scope>
       </dependency>
       <dependency>