Add explicitly vim-minimal in CentOS-based images

CentOS-9-Stream doesn't include any editor in the base image, map
vim-tiny to vim-minimal so we get at least one editor (and the terminfo
package that is helpful when using top).

Change-Id: Ibf85f279a9d0440dd6134e58f4d4f718407a277f

elements/amphora-agent/pkg-map

@@ -58,7 +58,7 @@
       "isc-dhcp-client": "dhclient",
       "uuid-runtime": "",
       "ubuntu-cloudimage-keyring": "",
-      "vim-tiny": "",
+      "vim-tiny": "vim-minimal",
       "apt-transport-https": "",
       "pollinate": "",
       "ifupdown": "",