feat: update git flags, minor vault fixes

[echoboomer]

• Updates --github-owner to --github-user for k3d.
• Updates --github-owner to --github-org for Civo.
• Updates --gitlab-owner to --gitlab-group for both.
• Adds progress printer for CoreDNS wait step for Civo to avoid no output while it waits.
• Adds some more wait logic to the Vault unseal process.

These commands were used for testing:

go run . k3d create --git-provider gitlab --gitlab-group kubefirstdev
go run . k3d create --git-provider github --github-user echoboomer (GITHUB_TOKEN set)
go run . k3d create (no GITHUB_TOKEN set)

go run . civo create \
    --alerts-email scott@kubeshop.io \
    --domain-name k-ray.space \
    --git-provider github \
    --github-org k-ray-space \
    --cluster-name k-ray-space

go run . civo create \
    --alerts-email scott@kubeshop.io \
    --domain-name k-ray.space \
    --git-provider gitlab \
    --gitlab-group kubefirstdev \
    --cluster-name k-ray-space