refactor: Remove ngrokAPICommon

[jonstacks]

What

Having ngrokAPICommon caused more problems than I think it solved. The code is messier for having it with having to mix & match struct initialization with setting values on the spec afterwards.

How

With the removal of edges, we have far fewer places where we are using this struct, so it seems like a good idea to get rid of it now.

Breaking Changes

No

[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.99%. Comparing base (e8d5d7d) to head (505a720).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/managerdriver/domains.go	50.00%	2 Missing ⚠️
cmd/api-manager.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #704      +/-   ##
==========================================
+ Coverage   48.74%   48.99%   +0.25%     
==========================================
  Files          95       95              
  Lines       10600    10594       -6     
==========================================
+ Hits         5167     5191      +24     
+ Misses       5074     5044      -30     
  Partials      359      359              

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