fix: fix paths IF intrinsic bug

[torresxb1]

Issue #, if available:

Description of changes:
A couple of places made an assumption of only getting the "then" case of an IF intrinsic. This affected a few integrations in swagger.py and openapi.py. The idea of the fix is to get both the "then" and "else" cases, and apply integrations to both.

Description of how you validated changes:

Checklist:

• Add/update unit tests using:
  • Correct values
  • Bad/wrong values (None, empty, wrong type, length, etc.)
  • Intrinsic Functions
• Add/update integration tests
• make pr passes
• Update documentation
• Verify transformed template deploys and application functions as expected

Examples?

Please reach out in the comments, if you want to add an example. Examples will be
added to sam init through https://github.com/awslabs/aws-sam-cli-app-templates/

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

[codecov-commenter]

Codecov Report

Merging #2330 (bede899) into develop (e7a1496) will increase coverage by 0.85%.
The diff coverage is 98.20%.

@@             Coverage Diff             @@
##           develop    #2330      +/-   ##
===========================================
+ Coverage    93.58%   94.43%   +0.85%     
===========================================
  Files           90       97       +7     
  Lines         6124     7063     +939     
  Branches      1260     1454     +194     
===========================================
+ Hits          5731     6670     +939     
- Misses         183      185       +2     
+ Partials       210      208       -2     

Impacted Files	Coverage Δ
samtranslator/model/api/api_generator.py	94.38% <92.95%> (+0.02%)	⬆️
samtranslator/__init__.py	100.00% <100.00%> (ø)
samtranslator/feature_toggle/dialup.py	100.00% <100.00%> (ø)
samtranslator/feature_toggle/feature_toggle.py	100.00% <100.00%> (+12.16%)	⬆️
samtranslator/intrinsics/actions.py	98.78% <100.00%> (+0.06%)	⬆️
samtranslator/intrinsics/resource_refs.py	95.83% <100.00%> (-0.17%)	⬇️
samtranslator/metrics/method_decorator.py	100.00% <100.00%> (ø)
samtranslator/metrics/metrics.py	100.00% <100.00%> (ø)
samtranslator/model/__init__.py	97.63% <100.00%> (-0.02%)	⬇️
samtranslator/region_configuration.py	77.77% <0.00%> (-22.23%)	⬇️
... and 41 more

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