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/telegram/internal/e2etest/suite.go

@@ -0,0 +1,50 @@
+package e2etest
+
+import (
+	"io"
+	"sync"
+
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/telegram/dcs"
+)
+
+// Suite is struct which contains external E2E test parameters.
+type Suite struct {
+	TB      require.TestingT
+	appID   int
+	appHash string
+	dc      int
+	logger  *zap.Logger
+
+	rand io.Reader
+	// already used phone numbers
+	used    map[string]struct{}
+	usedMux sync.Mutex
+}
+
+// NewSuite creates new Suite.
+func NewSuite(tb require.TestingT, config TestOptions) *Suite {
+	config.setDefaults()
+	return &Suite{
+		TB:      tb,
+		appID:   config.AppID,
+		appHash: config.AppHash,
+		dc:      config.DC,
+		logger:  config.Logger,
+		rand:    config.Random,
+		used:    map[string]struct{}{},
+	}
+}
+
+// Client creates new *telegram.Client using this suite.
+func (s *Suite) Client(logger *zap.Logger, handler telegram.UpdateHandler) *telegram.Client {
+	return telegram.NewClient(s.appID, s.appHash, telegram.Options{
+		DC:            s.dc,
+		DCList:        dcs.Test(),
+		Logger:        logger,
+		UpdateHandler: handler,
+	})
+}