chore: improve test coverage for webhook generation

[samayer12]

Description

We identified a testing gap that exists when a webhook is generated from an instance of the Assets object that has Assets.host defined. This test case addresses that gap.

NOTE: There's some tight coupling with the Assets class and the use of a massive JSON string to create our test assets object in this file. Resolving those issue are outside the scope of this PR but do need to be addressed by future work. See #1816 and #1817

Related Issue

Fixes #1723

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 81.59%. Comparing base (9c54ecb) to head (7151e3c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1815      +/-   ##
==========================================
- Coverage   82.12%   81.59%   -0.53%     
==========================================
  Files          52       54       +2     
  Lines        2215     2239      +24     
  Branches      436      473      +37     
==========================================
+ Hits         1819     1827       +8     
+ Misses        394      383      -11     
- Partials        2       29      +27     

see 10 files with indirect coverage changes

[cmwylie19]

adds test for the host