test/e2e: Collect CatalogSource testing artifacts and delete empty files (#2460)

Update the test/e2e/collect-ci-artifacts.sh bash script and extend the
list of resources gathered to also create a snapshot of CatalogSource
resources in the test namespace.

Signed-off-by: timflannagan <[email protected]>

Author: timflannagan

test/e2e/collect-ci-artifacts.sh

@@ -11,6 +11,7 @@ set -o errexit
 mkdir -p "${TEST_ARTIFACTS_DIR}"
 
 commands=()
+commands+=("get catalogsources -o yaml")
 commands+=("get subscriptions -o yaml")
 commands+=("get operatorgroups -o yaml")
 commands+=("get clusterserviceversions -o yaml")