Apply #pragma once, misc cleanup (#12322)

* Apply #pragma once in headers
* Adjust some thermistors formatting
* Misc cleanup and formatting

Marlin/src/feature/baricuda.h

@@ -19,11 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
-#ifndef __BARICUDA_H__
-#define __BARICUDA_H__
+#pragma once
 
 extern uint8_t baricuda_valve_pressure,
                baricuda_e_to_p_pressure;
-
-#endif // __BARICUDA_H__