Update Integration API and use custom tags on structs for better readability

[matzew]

Proposed Changes

• starting with custom tags for complicated camel properties, to make the source spec easier to read

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Docs

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [matzew]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Attention: Patch coverage is 58.33333% with 5 lines in your changes missing coverage. Please review.

Project coverage is 64.58%. Comparing base (9d67389) to head (2167a43).

Files with missing lines	Patch %	Lines
...ler/integrationsource/resources/containersource.go	66.66%	2 Missing and 1 partial ⚠️
...kg/apis/sources/v1alpha1/integration_validation.go	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8321   +/-   ##
=======================================
  Coverage   64.58%   64.58%           
=======================================
  Files         373      373           
  Lines       22619    22619           
=======================================
  Hits        14609    14609           
  Misses       7244     7244           
  Partials      766      766           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.