Swap to nfs-utils, not nfs-utils-coreos

The `nfs-utils-coreos` package was created to not depend on
Python mainly, but we are way deep into many other packages
that do at this point.

There's some other package that `Requires: nfs-utils` that
this should fix.

tier-1/manifest.yaml

@@ -17,8 +17,7 @@ include:
 packages:
   # Include and set the default editor
   - nano
-  # Minimal NFS client
-  - nfs-utils-coreos
+  - nfs-utils
   # Additional firewall support; we aren't including these in RHCOS or they
   # don't exist in RHEL
   - iptables-nft iptables-services