remove sdfat, use sdfat fork in testbed

importing sdfat along with testbed was causing conflicts since it was importing both sdfat from rp2040 and sdfat - adafruit fork from testbed

Author: BlitzCityDIY

Factory_Tests/Feather_RP2040_Adalogger/Feather_RP2040_Adalogger.ino

@@ -2,9 +2,8 @@
 //
 // SPDX-License-Identifier: MIT
 
-#include <SdFat.h>
 #include <SPI.h>
-#include "Adafruit_TestBed.h"
+#include <Adafruit_TestBed.h>
 
 SdFat SD;
 SdFile file;