edk2toollib/database: remove autoincrement id

[Javagedes]

Removes autoincrementing primary keys from instanced_fv, instanced_inf and source tables. Tables depending on an autoincremented index as a foreign key end up breaking when doing a naive merge of two databases as the index is automatically updated in the table where it is the primary key, but it is not updated in the table where it is a foreign key, thus breaking the association.

To support merging two databases where we will never know the true tables in the database (A developer can register a subset of provided tables or create their own), core tables should not use autoincremented primary keys.

instanced_fv table

This removal was simple as there was no existing dependencies that utilized the auto-incremented primary key. Getting the same association can be done via combining the env and fv_name columns.

instanced_inf table

This removal is more complex as the autoincremented id was directly used when associating the inf's with each other (when forming a dependency list). Getting the same association can be done via combining the env and component columns. This change made it such that the provided junction table does not work, and an instanced_inf_junction table was created to support this.

source table

This removal was simple as there was no existing dependencies that utilized the auto-incremented primary key. Getting the same association can be done via the path column.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (a2c523d) 80.90% compared to head (d0ff2f8) 80.93%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #412      +/-   ##
==========================================
+ Coverage   80.90%   80.93%   +0.02%     
==========================================
  Files          57       57              
  Lines        7276     7284       +8     
==========================================
+ Hits         5887     5895       +8     
  Misses       1389     1389              

Files	Coverage Δ
edk2toollib/database/tables/instanced_fv_table.py	100.00% <100.00%> (ø)
edk2toollib/database/tables/instanced_inf_table.py	98.60% <100.00%> (+0.08%)	⬆️
edk2toollib/database/tables/source_table.py	100.00% <ø> (ø)

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