Navigation Bar: Remove plugins link under Server Admin (#54386)

* Navigation Bar: Remove plugins link under Server Admin

* Modify frontend to handle admin plugins as just plugins

* update assets and documentation mentioned path

* Fix copy to remove redundant text

pkg/api/index.go

@@ -366,7 +366,7 @@ func (hs *HTTPServer) setupConfigNodes(c *models.ReqContext) ([]*dtos.NavLink, e
 		})
 	}
 
-	if c.OrgRole == org.RoleAdmin {
+	if c.OrgRole == org.RoleAdmin || (hs.Cfg.PluginAdminEnabled && ac.ReqGrafanaAdmin(c)) {
 		configNodes = append(configNodes, &dtos.NavLink{
 			Text:        "Plugins",
 			Id:          "plugins",
@@ -724,12 +724,6 @@ func (hs *HTTPServer) buildAdminNavLinks(c *models.ReqContext) []*dtos.NavLink {
 		})
 	}
 
-	if hs.Cfg.PluginAdminEnabled && ac.ReqGrafanaAdmin(c) {
-		adminNavLinks = append(adminNavLinks, &dtos.NavLink{
-			Text: "Plugins", Id: "admin-plugins", Url: hs.Cfg.AppSubURL + "/admin/plugins", Icon: "plug",
-		})
-	}
-
 	return adminNavLinks
 }