CNI File watcher and pre applying rules setup (#1345)

* Add file watcher to CNI installer to watch for config file changes and repair breakages.
* Wait for CNI config file to show up on the host file system before attempting to install consul-cni configuration.
* Add some code to get ready for the next PR that applying iptables rules
* Unit tests for installer and plugin scenarios

control-plane/go.mod

@@ -52,7 +52,6 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/bgentry/speakeasy v0.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.1.1 // indirect
-	github.com/containernetworking/cni v1.1.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/denverdino/aliyungo v0.0.0-20170926055100-d3308649c661 // indirect
 	github.com/digitalocean/godo v1.10.0 // indirect
@@ -70,7 +69,6 @@ require (
 	github.com/googleapis/gax-go/v2 v2.0.5 // indirect
 	github.com/googleapis/gnostic v0.5.5 // indirect
 	github.com/gophercloud/gophercloud v0.1.0 // indirect
-	github.com/hashicorp/consul-k8s/control-plane/cni v0.0.0-20220622202014-ebf6603ca2ab // indirect
 	github.com/hashicorp/errwrap v1.0.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-immutable-radix v1.3.0 // indirect