fix: revert Authorizer NONE for custom Swagger

[ShreyaGangishetty]

Reverts PR: #1211
This reverts commit fefc61f.

Issue #, if available:

Description of changes:

Description of how you validated changes:

Checklist:

• Write/update tests
• make pr passes
• Update documentation
• Verify transformed template deploys and application functions as expected
• Add/update example to examples/2016-10-31

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

Merging #1357 into release/v1.20.0 will decrease coverage by 0.02%.
The diff coverage is 97.43%.

@@                 Coverage Diff                 @@
##           release/v1.20.0    #1357      +/-   ##
===================================================
- Coverage            94.42%   94.39%   -0.03%     
===================================================
  Files                   78       78              
  Lines                 4554     4553       -1     
  Branches               912      910       -2     
===================================================
- Hits                  4300     4298       -2     
- Misses                 119      120       +1     
  Partials               135      135

Impacted Files	Coverage Δ
samtranslator/model/eventsources/push.py	90.3% <97.43%> (-0.23%)	⬇️
samtranslator/translator/translator.py	98.38% <0%> (+0.01%)	⬆️

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