control-service: remove needless variable from gitlab variables (#2334)

# Why
It makes everything simpler. 
We are loading the config from a gitlab variable when the same content
can be loaded from a file in the repo.

There is not reason to use a gitlab variable and it makes us less
dependant on gitlab.


After this is merged I will remove the variable in gitlab. 


# How was this tested
NA

Signed-off-by: murphp15 <murphp15@tcd.ie>
Co-authored-by: paulm2 <paulm2@vmware.com>

Author: murphp15

projects/control-service/cicd/deploy-testing-pipelines-service.sh

@@ -16,7 +16,7 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 export TAG=${TAG:-$(git rev-parse --short HEAD)}
 export FRONTEND_TAG=${FRONTEND_TAG:-$(git rev-parse --short HEAD)}
 export RELEASE_NAME=${RELEASE_NAME:-cicd-control-service}
-export VDK_OPTIONS=${VDK_OPTIONS:-"$SCRIPT_DIR/vdk-options.ini"}
+export VDK_OPTIONS="$SCRIPT_DIR/vdk-options.ini"
 export TPCS_CHART=${TPCS_CHART:-"$SCRIPT_DIR/../projects/helm_charts/pipelines-control-service"}
 export VDK_DOCKER_REGISTRY_URL=${VDK_DOCKER_REGISTRY_URL:-"registry.hub.docker.com/versatiledatakit"}
 export TESTING_PIPELINES_SERVICE_VALUES_FILE=${TESTING_PIPELINES_SERVICE_VALUES_FILE:-"$SCRIPT_DIR/testing-pipelines-service-values.yaml"}