[BUG] No way to customize the cluster IP CIDR

[baprx]

Describe the bug
The cluster struct has ClusterCidr field which cannot be provided from the command line:

❯ autok3s -d create \
    --provider native \
    --name k3s\
    --ssh-user ubuntu \
    --ssh-key-path ./infrastructure/oci/autok3s/id_ed25519 \
    --master-ips 10.0.1.201 \
    --server-config-file ./infrastructure/oci/autok3s/config.yml \
    --cluster-cidr 10.10.0.0/16 \
    --cluster
Error: unknown flag: --cluster-cidr

Since the value stays empty, the default CIDR is provided to the installation script:

autok3s/pkg/cluster/commands.go

Lines 138 to 141 in f548372

	if cluster.ClusterCidr != "" {
	runArgs = append(runArgs, "--cluster-cidr="+cluster.ClusterCidr)
	}

Even if we pass this flag using --master-extra-args '--cluster-cidr 10.10.0.0/16', the result is a duplicated entry in the env var: INSTALL_K3S_EXEC='server --advertise-address=10.0.1.201 --cluster-cidr=10.42.0.0/16 --cluster-init --node-external-ip=10.0.1.201 --tls-san=10.0.1.201 --cluster-cidr 10.10.0.0/16' leading to a k3s misconfiguration.

Expected behavior
A way to provide the cluster IP address (either from server-config-file or directly as an auto-k3s flag).

[JacieChao]

The configuration should work with server-config-file. We will fix it in next version.