Support nested ssl_verify fields

[mheap]

The previous implementation assumed that ssl_verify was at the top level of all configurations. This isn't true - the new implementation fixes nested values as expected.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 82.08955% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 32.94%. Comparing base (f5fe146) to head (2690bd1).

Files with missing lines	Patch %	Lines
convert/plugin_updates_314.go	82.08%	8 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1989      +/-   ##
==========================================
+ Coverage   32.52%   32.94%   +0.41%     
==========================================
  Files          77       77              
  Lines        6914     6975      +61     
==========================================
+ Hits         2249     2298      +49     
- Misses       4485     4493       +8     
- Partials      180      184       +4     

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