FRS37572 ISI HAM and BSC WD Plots Not Working

Ryan C, Erik, Dave:

The MEDM buttons to plot the latest ISI WD trips (see attached) have not been working for some time.

We found the issue was due to the wd_plot python code running in the conda environment had pydv issues, but if ran in native debian it worked.

Fixing the conda pydv issue would take significant resouces, so we chose to change the MEDM launcher to explicitly run local /usr/bin/python3.

The common MEDM file ISI_CUST_CHAMBER_WATCHDOG.adl in the isi/comon/medm/[hamisi, bscisi]/ directories were changed accordingly.

I tested with HAM2 and BSC3.