Summary:
Original commit: fa3815268dce56faf25f0da9e532fb1e3fc31714 / D38602
dnf install hostname was failing waiting for user interaction.  Add the -y option
to avoid that.

Test Plan: Built the UBI:8 image locally

Reviewers: devops, dshubin, steve.varnau

Reviewed By: dshubin

Subscribers: devops

Differential Revision: https://phorge.dev.yugabyte.com/D38603