request/nonce: Refactor to simplify package and prevent consecutive mutex lock calls when accessing/setting nonce values (#1506)

* improv. timed mutex

* Add all protection back in and jankyness because races. :'(

* Add intial benchmarkeroos

* Add master benchmarks

* goodness me

* what?

* what again?

* glorious: nits

* just a swaperino instead

* clean up package nonce so that we only need to aquire mutex once

* unlock before checking master

* commentary

* wha

* more comment

* ch comment

* nonce: Allow for broad customisation externally with a ~2ns overhead

* glorious: nits maybe works?

---------

Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io>

exchanges/alphapoint/alphapoint.go

@@ -13,6 +13,7 @@ import (
 	"github.com/gorilla/websocket"
 	"github.com/thrasher-corp/gocryptotrader/common/crypto"
 	exchange "github.com/thrasher-corp/gocryptotrader/exchanges"
+	"github.com/thrasher-corp/gocryptotrader/exchanges/nonce"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/order"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/request"
 )
@@ -581,7 +582,7 @@ func (a *Alphapoint) SendAuthenticatedHTTPRequest(ctx context.Context, ep exchan
 		return err
 	}
 
-	n := a.Requester.GetNonce(true)
+	n := a.Requester.GetNonce(nonce.UnixNano)
 
 	headers := make(map[string]string)
 	headers["Content-Type"] = "application/json"