Add type handling for findings with locations saved as Strings

What does this MR do and why?

Add temporary type handling for findings with locations saved as Strings

In some cases we are seeing the value of Finding locations being returned as a string, breaking functionality (like dismissal). Particularly, in the #sha method where .dig is called on the location value (String values will throw an error).

We should find out why/how the location data is in the incorrect form and fix the actual problem to close out the issue.

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Related to #578431