Team LBAC: Move middleware to enterprise (#76969)

* Team LBAC: Move middleware to enterprise

* Remove ds proxy part

* Move utils to enterprise

pkg/api/pluginproxy/ds_proxy.go

@@ -272,15 +272,6 @@ func (proxy *DataSourceProxy) director(req *http.Request) {
 	if proxy.features.IsEnabled(featuremgmt.FlagIdForwarding) {
 		proxyutil.ApplyForwardIDHeader(req, proxy.ctx.SignedInUser)
 	}
-
-	if proxy.features.IsEnabled(featuremgmt.FlagTeamHttpHeaders) {
-		err := proxyutil.ApplyTeamHTTPHeaders(req, proxy.ds, proxy.ctx.Teams)
-		if err != nil {
-			// NOTE: could downgrade the errors to warnings
-			ctxLogger.Error("Error applying teamHTTPHeaders", "error", err)
-			return
-		}
-	}
 }
 
 func (proxy *DataSourceProxy) validateRequest() error {