Remove validation from sub-commands

cmd/flux/create.go

cmd/flux/create_alert.go

cmd/flux/create_alertprovider.go

cmd/flux/create_helmrelease.go

cmd/flux/create_image_policy.go

cmd/flux/create_image_repository.go

cmd/flux/create_image_update.go

cmd/flux/create_kustomization.go

cmd/flux/create_receiver.go

cmd/flux/create_secret_git.go

cmd/flux/create_secret_helm.go

cmd/flux/create_secret_tls.go

cmd/flux/create_source_bucket.go

cmd/flux/create_source_git.go

cmd/flux/create_source_helm.go

cmd/flux/create_tenant.go