Improve SQLite3 primary key constraint parsing

[JSCU-CNI]

This PR fixes SQLite3 table parsing for tables with primary keys defined in a table constraint. Specifically, constraints with multiple parts (but whom are not compound/composite or an expression). See the added test for an example.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (64ae6d8) to head (059951f).

Files with missing lines	Patch %	Lines
dissect/database/sqlite3/util.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #24   +/-   ##
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  Coverage   0.00%   0.00%           
=====================================
  Files        146     146           
  Lines       3881    3880    -1     
=====================================
+ Misses      3881    3880    -1     

Flag	Coverage Δ
unittests	0.00% <0.00%> (ø)

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[Schamper]

Stellar docstrings on this code 😄 took me a little bit to understand exactly what this was handling. I don't expect you to document all this old code but at least adding a comment on what your change handles would be very much appreciated.

I know the unit test also shows it, but showing it briefly in the code makes the code much easier to reason about.