SG-36129 add handling for data processing errors

[pscadding]

This was added to aid a feature on the tk-multi-shotgunpanel where if a bad custom sort field was added it would result in a error to the console but nothing in the UI.

This change means that the data_refresh_fail signal will be fired if the fetched data can't be processed.

I have concerns about the impact this change may have on other tools using this framework.

[carlos-villavicencio-adsk]

Since we didn't have error handling on this logic before, would it make sense to make the fail silent? I mean, just log everything and let it pass? As you mentioned in your other PR, we're not sure if this can impact other dependent modules.

[pscadding]

Having done more testing and discussed with @carlos-villavicencio-adsk I'm going to close this PR without merging.
We would prefer not to add risk by changing the utils here for the sake catching what will likely be a edge case scenario with the configuration of the panel app.

I still think the code change here is probably the right approach, had we chosen to go with it, so if needed in the future we could implement something similar.