t-beam supreme: fixes and consolidation

Made changes requested by Scott
Simplified gps init sequence and removed unnecessary code
Reverted SensorManager change
Updated PMU flow to enable header outputs

src/helpers/TBeamS3SupremeBoard.h

@@ -61,10 +61,10 @@ public:
 
   void begin() {
 
-    power_init();
-
     ESP32Board::begin();
 
+    power_init();
+
     esp_reset_reason_t reason = esp_reset_reason();
     if (reason == ESP_RST_DEEPSLEEP) {
       long wakeup_source = esp_sleep_get_ext1_wakeup_status();