[2.0.x] Rename and document some configuration options

[2.0.x] LPC1768 upload_extra_script.py fix (wrong type of exit method)

Co-Authored-By: ejtagle <ejtagle@hotmail.com>

* Use a different method to find the volume info in Windows

Co-Authored-By: ejtagle <ejtagle@hotmail.com>

- Ordering and match classification between `boards.h` and `pins.h`
- Check `pins.h` environments

STM32 ARM Cortex-M3 boards were listed as M4

Fix #10777 for 2.0.x

Co-Authored-By: Ante Vukorepa <o.orcinus@gmail.com>

As noted in #10777