Support provision with Podman or fix docs

[victortoso]

What happened:
Not sure what the preference, so I've created an issue. The docs.
Trying to do provision of k8s-1.32 with podman fails with:

+ [[ linux,k8s =~ linux.* ]]
+ cd ../centos9
+ ./build.sh
./build.sh: line 7: docker: command not found

Which is a 7 line file with the content

#!/bin/bash -e

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

centos_version="$(cat $DIR/version | tr -d '\n')"

docker build --build-arg BUILDARCH=$(uname -m) --build-arg centos_version=$centos_version . -t quay.io/kubevirtci/centos9

So I've just changed it to podman to see how it goes well till...

[3/3] STEP 9/11: COPY --from=imageartifactdownload /vmlinuz-* /vmlinuz
--> 83b60df0cc8d
[3/3] STEP 10/11: COPY --from=imageartifactdownload /initramfs-* /initrd.img
--> 70327c59452c
[3/3] STEP 11/11: COPY scripts/* /
[3/3] COMMIT quay.io/kubevirtci/centos9
--> d2bba27c6288
Successfully tagged quay.io/kubevirtci/centos9:latest
d2bba27c6288708ba906119415a923636bd3a0b5865f039a7e75d53ad85d2c47
+ SLIM_MODE=
+ false
+ ../gocli/build/cli provision 1.32 --phases linux,k8s
panic: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

goroutine 1 [running]:
kubevirt.io/kubevirtci/cluster-provision/gocli/cmd.provisionCluster(0xc00026c908, {0xc0003d88a0?, 0x4?, 0x1acc6b1?})
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/cmd/provision.go:153 +0x2bab
github.com/spf13/cobra.(*Command).execute(0xc00026c908, {0xc0003d8840, 0x3, 0x3})
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/vendor/github.com/spf13/cobra/command.go:983 +0xaaa
github.com/spf13/cobra.(*Command).ExecuteC(0xc00026c308)
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/vendor/github.com/spf13/cobra/command.go:1115 +0x3ff
github.com/spf13/cobra.(*Command).Execute(...)
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/vendor/github.com/spf13/cobra/command.go:1039
kubevirt.io/kubevirtci/cluster-provision/gocli/cmd.Execute()
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/cmd/root.go:47 +0x18
main.main()
        /home/toso/src/kubevirt/kubevirtci/cluster-provision/gocli/cmd/cli/main.go:8 +0xf

Looking at gocli, seems that docker is hardcoded there.

What you expected to happen:
Provision with podman succeed.

How to reproduce it (as minimally and precisely as possible):
Just try it without docker installed

Additional context:
Not urgent, just a nice to have.

Environment:

• KubeVirt version (use virtctl version): N/A
• Kubernetes version (use kubectl version): N/A
• VM or VMI specifications: N/A
• Cloud provider or hardware configuration: N/A
• OS (e.g. from /etc/os-release): N/A
• Kernel (e.g. uname -a): N/A
• Install tools: N/A
• Others: N/A

[aerosouund]

/assign