Handle Keys and Collections with a double underscore

[SteveDMurphy]

Closes #3687

Description Of Changes

Found by a user with naming conventions that use a double underscore, which we weren't handling previously

Code Changes

• Adds a test for the edge case
• Create and use a function that extracts the address information and includes the edge case

Steps to Confirm

• While you can set up a table named something like my__table__with__underscores add some data, and run a DSR against it, running the failing test against main will also show the result where only underscores would be returned

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

[cypress]

Passing run #3002 ↗︎

0	4	0	0	0
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Details:

Merge b57bf1e into f63a843...
Project: fides	Commit: 008a093fd6 ℹ️
Status: Passed	Duration: 01:11 💡
Started: Jun 30, 2023 9:42 AM	Ended: Jun 30, 2023 9:43 AM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (f63a843) 87.05% compared to head (b57bf1e) 87.06%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3688   +/-   ##
=======================================
  Coverage   87.05%   87.06%           
=======================================
  Files         310      310           
  Lines       18990    18997    +7     
  Branches     2446     2446           
=======================================
+ Hits        16532    16539    +7     
  Misses       2029     2029           
  Partials      429      429           

Impacted Files	Coverage Δ
src/fides/api/task/graph_task.py	93.17% <100.00%> (+0.02%)	⬆️
src/fides/api/task/task_resources.py	83.69% <100.00%> (+0.36%)	⬆️
src/fides/api/util/collection_util.py	96.77% <100.00%> (+0.47%)	⬆️

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[adamsachs]

nice fix - generally looks good to me, just had a small suggestion for what i think is a slightly simpler implementation! i'm also not 100% sure on your open question, so it may be good to get @pattisdr or @seanpreston's input on that one.

[adamsachs]

i like where you landed on this @SteveDMurphy! the number_of_leading_strings_to_exclude arg makes sense, and the docstring of that function helps to make clear the functionality that otherwise may be a bit confounding for someone coming back to this code. nice work! 👍