misc: adapt codebuild ci for alternative repos

Author: 0marperez

.github/scripts/run-codebuild-batch-job.sh

@@ -94,7 +94,9 @@ START_RESULT=$(
   aws codebuild start-build-batch \
     --project-name ${PROJECT_NAME} \
     --source-version $SOURCE_VERSION \
-    --environment-variables-override file:///tmp/gh_env_vars.json
+    --environment-variables-override file:///tmp/gh_env_vars.json \
+    --source-type-override GITHUB \
+    --source-location-override https://github.com/awslabs/"$GITHUB_REPOSITORY_NO_ORG".git
 )
 
 if [ "$?" != "0" ]; then