fix(grpcproxy): add GRPCKeepAliveEnforcementMinimum (#16567)

the absence of the setting potentially causes ENHANCE_YOUR_CALM

Signed-off-by: phanama <yudiandreanp@gmail.com>
Co-authored-by: phanama <yudiandreanp@gmail.com>

pkg/apiclient/grpcproxy.go

@@ -13,9 +13,11 @@ import (
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/status"
 
+	"github.com/argoproj/argo-cd/v2/common"
 	argocderrors "github.com/argoproj/argo-cd/v2/util/errors"
 	argoio "github.com/argoproj/argo-cd/v2/util/io"
 	"github.com/argoproj/argo-cd/v2/util/rand"
@@ -112,6 +114,11 @@ func (c *client) startGRPCProxy() (*grpc.Server, net.Listener, error) {
 	}
 	proxySrv := grpc.NewServer(
 		grpc.ForceServerCodec(&noopCodec{}),
+		grpc.KeepaliveEnforcementPolicy(
+			keepalive.EnforcementPolicy{
+				MinTime: common.GRPCKeepAliveEnforcementMinimum,
+			},
+		),
 		grpc.UnknownServiceHandler(func(srv interface{}, stream grpc.ServerStream) error {
 			fullMethodName, ok := grpc.MethodFromServerStream(stream)
 			if !ok {