Minor watchdog improvements (helping user diagnose issue)

[raph-luc]

Adding exception catch to Watchdog module that writes to a pyfluent_watchdog.err file if it catches anything, and additional logging calls

Edit: regardless of diagnosing the user issue, I think these changes should be merged into main, as they may be helpful in the future, going to mark this PR ready for review.

The changes to watchdog.py file are hard to understand on GitHub, but are mainly just tabbing everything to the right to add a try except block to log any exceptions:

pyfluent/src/ansys/fluent/core/launcher/watchdog.py

Lines 298 to 300 in df18cee

	except Exception as exc:
	with open("pyfluent_watchdog.err", "a") as file:
	file.write("%s: %s" % (type(exc).__name__, exc))