Add dosfstools, mtools to ironic-pxe

This is required to refactor the init scripts to accomodate IPA inject
CA work. Currently this is done with an ironic-conductor image but it
needs to switch to ironic-pxe, and actually this is a more appropriate
image to build the ESP image with.

Jira: OSPRH-4541

Author: steveb

container-images/tcib/base/os/ironic-base/ironic-pxe/ironic-pxe.yaml

@@ -12,3 +12,5 @@ tcib_packages:
   - grub2-efi-x64
   - shim
   - iproute
+  - dosfstools
+  - mtools