chore: add unit test for webhooks

[cmwylie19]

Description

Added coverage to webhooks to ensure correctness of webhook rules, config and values.

Related Issue

Fixes #1656

Relates to #

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Unit, Journey, E2E Tests, docs, adr added or updated as needed
• Contributor Guide Steps followed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.32%. Comparing base (6e131ce) to head (256edd9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1744      +/-   ##
==========================================
+ Coverage   79.76%   81.32%   +1.55%     
==========================================
  Files          50       50              
  Lines        2120     2120              
  Branches      431      453      +22     
==========================================
+ Hits         1691     1724      +33     
+ Misses        427      370      -57     
- Partials        2       26      +24     

Files with missing lines	Coverage Δ
src/lib/assets/webhooks.ts	95.91% <100.00%> (+67.34%)	⬆️

... and 7 files with indirect coverage changes

[btlghrants]

And then there were some where there used to be none! Huzzah!