Add migration information to release docs and fix scripts (#4026)

Release Notes:

- N/A

script/deploy-collab

@@ -4,7 +4,7 @@ set -eu
 source script/lib/deploy-helpers.sh
 
 if [[ $# < 2 ]]; then
-  echo "Usage: $0 <production|staging|preview> <tag-name> (nightly is not yet supported)"
+  echo "Usage: $0 <production|preview|nightly|staging> <tag-name>"
   exit 1
 fi
 environment=$1

script/what-is-deployed

@@ -4,16 +4,11 @@ set -eu
 source script/lib/deploy-helpers.sh
 
 if [[ $# < 1 ]]; then
-  echo "Usage: $0 <production|staging|preview> (nightly is not yet supported)"
+  echo "Usage: $0 <production|preview|nightly|staging>"
   exit 1
 fi
 environment=$1
 
-if [[ ${environment} == "nightly" ]]; then
-  echo "nightly is not yet supported"
-  exit 1
-fi
-
 export_vars_for_environment ${environment}
 target_zed_kube_cluster