MM-10702 Moving plugins to use hashicorp go-plugin. (#8978)

* Moving plugins to use hashicorp go-plugin.

* Tweaks from feedback.

api4/plugin.go

@@ -24,11 +24,10 @@ func (api *API) InitPlugin() {
 	api.BaseRoutes.Plugin.Handle("", api.ApiSessionRequired(removePlugin)).Methods("DELETE")
 
 	api.BaseRoutes.Plugins.Handle("/statuses", api.ApiSessionRequired(getPluginStatuses)).Methods("GET")
-	api.BaseRoutes.Plugin.Handle("/activate", api.ApiSessionRequired(activatePlugin)).Methods("POST")
-	api.BaseRoutes.Plugin.Handle("/deactivate", api.ApiSessionRequired(deactivatePlugin)).Methods("POST")
+	api.BaseRoutes.Plugin.Handle("/enable", api.ApiSessionRequired(enablePlugin)).Methods("POST")
+	api.BaseRoutes.Plugin.Handle("/disable", api.ApiSessionRequired(disablePlugin)).Methods("POST")
 
 	api.BaseRoutes.Plugins.Handle("/webapp", api.ApiHandler(getWebappPlugins)).Methods("GET")
-
 }
 
 func uploadPlugin(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -165,7 +164,7 @@ func getWebappPlugins(c *Context, w http.ResponseWriter, r *http.Request) {
 	w.Write([]byte(model.ManifestListToJson(clientManifests)))
 }
 
-func activatePlugin(c *Context, w http.ResponseWriter, r *http.Request) {
+func enablePlugin(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequirePluginId()
 	if c.Err != nil {
 		return
@@ -189,7 +188,7 @@ func activatePlugin(c *Context, w http.ResponseWriter, r *http.Request) {
 	ReturnStatusOK(w)
 }
 
-func deactivatePlugin(c *Context, w http.ResponseWriter, r *http.Request) {
+func disablePlugin(c *Context, w http.ResponseWriter, r *http.Request) {
 	c.RequirePluginId()
 	if c.Err != nil {
 		return