convert CDK gsc submodule to kotlin (#36437)

convert CDK gsc submodule to kotlin

fix compiler errors

Author: stephane-airbyte

airbyte-cdk/java/airbyte-cdk/core/src/main/resources/version.properties

@@ -1 +1 @@
-version=0.28.9
+version=0.28.10

airbyte-cdk/java/airbyte-cdk/gcs-destinations/build.gradle

@@ -8,6 +8,18 @@ java {
     }
 }
 
+compileKotlin {
+    compilerOptions {
+        allWarningsAsErrors = false
+    }
+}
+
+compileTestFixturesKotlin {
+    compilerOptions {
+        allWarningsAsErrors = false
+    }
+}
+
 dependencies {
     implementation project(':airbyte-cdk:java:airbyte-cdk:dependencies')
     implementation project(':airbyte-cdk:java:airbyte-cdk:core')