Include tzdb package in RKE2 core images

[brandond]

Is your feature request related to a problem? Please describe.

Currently, users who want to use zone names in the TZ env var have to mount /usr/share/zoneinfo into the Kubernetes pods. We should include tzdb in the images so that this is not necessary.

Ref: #2192

Describe the solution you'd like

tzdb files are available to Kubernetes pods

Describe alternatives you've considered

• Mount /usr/share/zoneinfo into all the static pods whenever setting TZ

  kube-apiserver-extra-mount:
    - "/usr/share/zoneinfo:/usr/share/zoneinfo:ro:Directory"
  kube-apiserver-extra-env:
    - "TZ=Europe/Madrid"

• Have RKE2 just always mount /usr/share/zoneinfo into the static pods

Additional context

• RKE2 deployment k8s component time zone problem #2192