feat: single runtime for different databases (tenants) about ydb-go-sdk HOT 1 CLOSED

db, err := ydb.New(
	ctx,
	ydb.WithConnectionString("grpc://ydb-ru.yandex.net:2135/?database=/ru/home/gvit/mydb"),
	ydb.WithAccessTokenCredentials("TOKEN1"),
)
if err != nil {
	panic(err)
}
defer func() {
	_ = db.Close(ctx)
}()
// table service for connection config
err = db.Table().Do(ctx, func(ctx context.Context, session table.Session) error {
	_, err := session.StreamReadTable(ctx, "/path1")
	if err != nil {
		return err
	}
	return nil
})
if err != nil {
	panic(err)
}
// table service for another config
err = db.Table(
	ydb.WithDatabase("/ru/home/gvit/anotherdb"),
	ydb.WithEndpoint("ydb-ru-prestable.yandex.net:2135"),
	ydb.WithAccessTokenCredentials("TOKEN2"),
).Do(ctx, func(ctx context.Context, session table.Session) error {
	_, err := session.StreamReadTable(ctx, "/path2")
	if err != nil {
		return err
	}
	return nil
})
if err != nil {
	panic(err)
}