fix(build): reduce container image size

[sthaha]

This commit reduces container image size by

1. Removing yum update resulting in more reproducible builds. Updates to the packages are best obtained by pulling a newer base image (which is tested) than running yum update
2. fixing installation of dcgm only when it is enabled

❯ make build_containerized IMAGE_REPO=quay.io/sthaha CTR_CMD=docker
...
❯ docker images | head -n 5
REPOSITORY                                             TAG                             IMAGE ID       CREATED          SIZE
quay.io/sthaha/kepler                                  latest-dcgm                     ec386bae9d62   8 seconds ago    1.96GB
quay.io/sthaha/kepler                                  v0.7.9-dirty-linux-amd64-dcgm   ec386bae9d62   8 seconds ago    1.96GB
quay.io/sthaha/kepler                                  latest                          ff02e4ae267c   5 minutes ago    390MB
quay.io/sthaha/kepler                                  v0.7.9-dirty-linux-amd64        ff02e4ae267c   5 minutes ago    390MB

[sthaha]

See discusssion on slack: https://cloud-native.slack.com/archives/C05QK3KN3HT/p1712723192725319

[maryamtahhan]

I think #1332 added a check around the DCGM build that was more extensive. please see the image below

But actually looking at quay now it looks like only the no dcgm image :( probably need to check the workflow that's building the images more closely. (I checked the workflow - it appears to build the right thing at least)
But the changes here seem good to me other than leaving yum update

[sthaha]

But the changes here seem good to me other than leaving yum update

@maryamtahhan , please follow the discussion on https://cloud-native.slack.com/archives/C05QK3KN3HT/p1712723192725319

Yum update in Dockerfile results in builds that are more often than not, irreproducible.

See also:

• https://access.redhat.com/articles/2208321

[rootfs]

@sthaha there are still something missing, the dcgm container image is not built