move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/tdsync/log_group_test.go

@@ -0,0 +1,39 @@
+package tdsync
+
+import (
+	"context"
+	"testing"
+
+	"github.com/go-faster/errors"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zaptest"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/clock"
+)
+
+func TestLogGroup(t *testing.T) {
+	hook := func(e zapcore.Entry) error {
+		require.Contains(t, e.LoggerName, "group")
+		return nil
+	}
+	log := zaptest.NewLogger(t, zaptest.WrapOptions(zap.Hooks(hook)))
+	grp := NewLogGroup(context.Background(), log.Named("group"))
+	grp.SetClock(clock.System)
+
+	grp.Go("test-task", func(groupCtx context.Context) error {
+		<-groupCtx.Done()
+		return groupCtx.Err()
+	})
+
+	grp.Go("test-task2", func(groupCtx context.Context) error {
+		<-groupCtx.Done()
+		return nil
+	})
+
+	grp.Cancel()
+	if err := grp.Wait(); !errors.Is(err, context.Canceled) {
+		t.Error(err)
+	}
+}