[werft] set google terraform plugin to version 3.63.0 because DNS entries...

[werft] set google terraform plugin to version 3.63.0 because DNS entries could not be written in the newer version (#3916)

.werft/certs/versions.tf

@@ -2,6 +2,7 @@ terraform {
   required_providers {
     google = {
       source = "hashicorp/google"
+      version = "3.63.0"
     }
     kubectl = {
       source  = "gavinbunney/kubectl"