Add Git to Holos container image.

[WhyKickAmooCow]

Kustomize with a git ref remote resource requires git to be installed. As evidenced using the holos github action:

 error: accumulating resources: accumulation err='accumulating resources from 'https://github.com/kubernetes-csi/external-snapshotter.git//client/config/crd/?ref=v8.2.0': URL is a git repository': no 'git' program on path: exec: "git": executable file not found in $PATH
could not run: could not transform components/external-snapshotter/external-snapshotter.gen.yaml for external-snapshotter path ./components/external_snapshotter: could not run kustomize: could not run command:
	kubectl 'kustomize' '/tmp/holos.kustomize1771624502'
	exit status 1 at builder/v1alpha5/builder.go:615
could not run: could not render component: could not run command:
	holos '--log-level' 'info' '--log-format' 'console' 'render' 'component' '--inject' 'holos_component_name=external-snapshotter' '--inject' 'holos_component_path=components/external_snapshotter' './components/external_snapshotter'
	exit status 1 at cli/render/render.go:171

so it would be great if it could be included in the container image.

[jeffmccune]

Agreed, thanks for reporting this.