Hil tests pdm pcm

[NikhitaR-IFX]

Summary

• Small refactor to get tests working. Currently 16 bit all modes are tested.
• Updated HIL test setup and docs.
• Updated docs and removed non-working bit configs and disabled in code as well.

[github-actions]

Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS
  qemu rv32:    +0 +0.000% VIRT_RV32

[jaenrig-ifx]

All very nice 👯
Some tests are now failing as I added the pdm connection, but I will get it out of the HIL and ensure it runs properly.
The cabling is not the most reliable... and I might have broken proper contact between some of these jumper cables.

Meanwhile, only a few comments and changes to fully wrap the PR 🔧