enabling spotbugs for datastore-postgres submodule (#36704)

Author: stephane-airbyte

airbyte-cdk/java/airbyte-cdk/datastore-postgres/build.gradle

@@ -11,8 +11,6 @@ compileKotlin {
     }
 }
 
-spotbugsTest.enabled = false
-
 dependencies {
     implementation project(':airbyte-cdk:java:airbyte-cdk:airbyte-cdk-dependencies')
     implementation project(':airbyte-cdk:java:airbyte-cdk:airbyte-cdk-core')

airbyte-cdk/java/airbyte-cdk/datastore-postgres/src/test/kotlin/io/airbyte/cdk/db/PostgresUtilsTest.kt

@@ -108,12 +108,12 @@ internal class PostgresUtilsTest {
     }
 
     companion object {
-        lateinit var PSQL_DB: PostgreSQLContainer<Nothing>
+        var PSQL_DB: PostgreSQLContainer<Nothing> =
+            PostgreSQLContainer<Nothing>("postgres:13-alpine")
 
         @JvmStatic
         @BeforeAll
         fun init(): Unit {
-            PSQL_DB = PostgreSQLContainer<Nothing>("postgres:13-alpine")
             PSQL_DB.start()
         }
     }