Provisioning: Adds support for enabling app plugins (#25649)

Adds support for enabling app plugins using provisioning. 

Ref #11409

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

pkg/api/admin_provisioning.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"context"
+
 	"github.com/grafana/grafana/pkg/models"
 )
 
@@ -21,6 +22,14 @@ func (server *HTTPServer) AdminProvisioningReloadDatasources(c *models.ReqContex
 	return Success("Datasources config reloaded")
 }
 
+func (server *HTTPServer) AdminProvisioningReloadPlugins(c *models.ReqContext) Response {
+	err := server.ProvisioningService.ProvisionPlugins()
+	if err != nil {
+		return Error(500, "Failed to reload plugins config", err)
+	}
+	return Success("Plugins config reloaded")
+}
+
 func (server *HTTPServer) AdminProvisioningReloadNotifications(c *models.ReqContext) Response {
 	err := server.ProvisioningService.ProvisionNotifications()
 	if err != nil {