Description of problem:
 https://issues.redhat.com/browse/OCPBUGS-18157
This bug is closed, so need add a remind in the doc: a single CSV exceeding 1m cannot be run through operator sdk, right？
Run bundle with large FBC index (size >3M):

1. operator-sdk run bundle quay.io/olmqe/upgradeindex-bundle:v0.1 --index-image quay.io/olmqe/largefbcindexwithupgradefbc:v4.11 --timeout 5m --security-context-config=restricted
   INFO[0006] Creating a File-Based Catalog of the bundle "quay.io/olmqe/upgradeindex-bundle:v0.1"
   INFO[0008] Rendering a File-Based Catalog of the Index Image "quay.io/olmqe/largefbcindexwithupgradefbc:v4.11" to verify if bundle "upgradeindex.v0.0.1" is present
   INFO[0012] Generated the extra FBC for the bundle image "upgradeindex.v0.0.1"
   INFO[0019] Generated a valid File-Based Catalog
   FATA[0032] Failed to run bundle: create catalog: error creating registry pod: error building registry pod definition: configMap error: error updating ConfigMap: error creating ConfigMap: ConfigMap "upgradeindex-catalog-configmap-partition-5" is invalid: []: Too long: must have at most 1048576 bytes