Fixes:#3522

This PR concludes the autogenerating docs initiative with a basic Swagger validator and custom rules, that will let us keep the better quality of docs. The validator usesgo/ast to parse comments and Go structure fields. It covers OSS and Enterprisechi handlers.

Checks:

1. Ensure consistency between@Summary and@ID.
2. Verify@Success and/or@Failure.
3. Verify presence of required annotations.
4. Make sure that Go comment (above the function) is before swagger's@...
5. Ensure that path parameters are defined.
6. Ensure that@Security tag is present.
7. Verify@Accept annotation.
8. Verify@Produce annotation.
9. Ensure unique swagger routes - no copy/paste mistakes.
10. Make sure thatuuid.UUID andtime.Time fields are formatted.

To reviewer:

• There are many files in this PR, mainly due to minor fixes spotted while implementing the validator. I suggest starting the peer review withcoderdtest/swaggerparser.go.