feat: Create endpoint to retrieve default API doc for service

[CarsonCook]

Description

• Create endpoint /apidoc/{serviceId} that will return the default swagger doc for the given service. The default swagger doc functionality was already made, this endpoint just exposes it directly. The default doc is the apiInfo marked with defaultApi: true, and if none are marked as default then the highest major version is used. If there is no swagger doc then 404 is returned.
• Change behaviour for the specific version apidoc endpoint /apidoc/{serviceId}/{apiId} to return 404 if there is no matching swagger, instead of returning the "first" swagger.

Linked to #2320

Type of change

Please delete options that are not relevant.

• (fix) Bug fix (non-breaking change which fixes an issue)
• (feat) New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas. In JS I did provide JSDoc
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• The java tests in the area I was working on leverage @nested annotations

For more details about how should the code look like read the Contributing guideline

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

83.3% Coverage
0.0% Duplication