POD settings.jsonc parsing fails silently

If there is an error in a POD settings.jsonc file, the framework dies with a rather unintuitive error messge:

  File "MDTF-diagnostics/src/diagnostic.py", line 493, in from_config
    return cls.from_struct(pod_name, config.pod_data[pod_name])
KeyError: 'some_failed_pod'

If the parsing for a particular POD fails, the POD is appended to a bad_pods list but no warning is given. This makes troubleshooting difficult

MDTF-diagnostics/src/mdtf_info.py

Lines 48 to 54 in 70622b2

    
           for p in pod_list: 
        
               try: 
        
                   d = _load_one_json(p) 
        
                   assert d 
        
               except Exception as exc: 
        
                   bad_pods.append(p) 
        
                   continue

@wrongkindofdoctor, @tsjackson-noaa -- any thoughts on this?

	for p in pod_list:
	try:
	d = _load_one_json(p)
	assert d
	except Exception as exc:
	bad_pods.append(p)
	continue