Add support to auto discover envoy processes (#459)

* discover envoy pids using cluster ips

* add istio flag to cli + rename mtls flag to istio

* add istio.md to docs

* Fixing typos

* Fix minor typos and grammer in docs

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>

shared/kubernetes/mizuTapperSyncer.go

@@ -43,6 +43,7 @@ type TapperSyncerConfig struct {
 	IgnoredUserAgents        []string
 	MizuApiFilteringOptions  api.TrafficFilteringOptions
 	MizuServiceAccountExists bool
+	Istio                    bool
 }
 
 func CreateAndStartMizuTapperSyncer(ctx context.Context, kubernetesProvider *Provider, config TapperSyncerConfig) (*MizuTapperSyncer, error) {
@@ -222,6 +223,7 @@ func (tapperSyncer *MizuTapperSyncer) updateMizuTappers() error {
 			tapperSyncer.config.ImagePullPolicy,
 			tapperSyncer.config.MizuApiFilteringOptions,
 			tapperSyncer.config.LogLevel,
+			tapperSyncer.config.Istio,
 		); err != nil {
 			return err
 		}