V2: Support produce comment

[Nerzal]

Describe the PR
Add basic support for the produce comment.
The implementation is based on some assumptions and is only been done to be able to parse swaggo v1 comments.

Relation issue
#1550

Additional context
We should update the //@Success comment in the future to incorporate the changes and additional fields of open api v3.1.0.
The support of the produce comment is more of a workaround right now.

Looking at the structure of the V3 data, i'd recommend either additional comment types or expanding the //@Success.

[codecov]

Codecov Report

Patch coverage: 80.48% and project coverage change: +0.01 🎉

Comparison is base (a3046bf) 77.66% compared to head (bddf978) 77.67%.

❗ Current head bddf978 differs from pull request most recent head 54675d1. Consider uploading reports for the commit 54675d1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##               v2    #1551      +/-   ##
==========================================
+ Coverage   77.66%   77.67%   +0.01%     
==========================================
  Files          21       21              
  Lines        5488     5528      +40     
==========================================
+ Hits         4262     4294      +32     
- Misses       1044     1048       +4     
- Partials      182      186       +4     

Impacted Files	Coverage Δ
parserv3.go	74.78% <50.00%> (-0.22%)	⬇️
operationv3.go	83.60% <83.78%> (+0.01%)	⬆️

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