Audience validation support for APIM

[Kirishikesan]

Overview

API authentication with audience restriction in JWT (JSON Web Token) involves ensuring that the token is only accepted by the intended audience or recipients. The audience claim (aud) in a JWT specifies the intended recipients for the token. This PR adds api level audience validation in JWT tokens for api manager.

Resolves

wso2/api-manager#2784

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Attention: Patch coverage is 57.85714% with 59 lines in your changes missing coverage. Please review.

Project coverage is 46.87%. Comparing base (af47e58) to head (371a2b7).
Report is 364 commits behind head on master.

Files	Patch %	Lines
...i/publisher/v1/common/mappings/APIMappingUtil.java	51.85%	4 Missing and 9 partials ⚠️
...gt/gateway/handlers/security/jwt/JWTValidator.java	44.44%	8 Missing and 2 partials ⚠️
...t/rest/api/publisher/v1/dto/APIProductInfoDTO.java	22.22%	7 Missing ⚠️
...pimgt/rest/api/publisher/v1/dto/APIProductDTO.java	40.00%	6 Missing ⚠️
...arbon/apimgt/rest/api/publisher/v1/dto/APIDTO.java	44.44%	5 Missing ⚠️
...n/apimgt/rest/api/publisher/v1/dto/APIInfoDTO.java	44.44%	5 Missing ⚠️
...t/api/publisher/v1/common/TemplateBuilderUtil.java	60.00%	2 Missing and 2 partials ⚠️
...ay/handlers/security/APIAuthenticationHandler.java	71.42%	0 Missing and 2 partials ⚠️
...ateway/handlers/security/APISecurityConstants.java	0.00%	2 Missing ⚠️
...on/apimgt/persistence/RegistryPersistenceImpl.java	66.66%	0 Missing and 2 partials ⚠️
... and 2 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12404      +/-   ##
============================================
+ Coverage     41.79%   46.87%   +5.07%     
- Complexity        0     4203    +4203     
============================================
  Files          1871     1871              
  Lines        138441   138575     +134     
  Branches      20045    20071      +26     
============================================
+ Hits          57868    64961    +7093     
+ Misses        73570    65859    -7711     
- Partials       7003     7755     +752     

Flag	Coverage Δ
integration_tests	41.43% <57.85%> (+6.33%)	⬆️
unit_tests	20.11% <20.38%> (-0.01%)	⬇️

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[RakhithaRR]

Closing this since the feature is added through #12511