fix: do not require name/id for filter-chain entities

[flrgh]

Summary

This relaxes the JSON schema for filter chain entities to not require name or id. Filter chains are always associated with a service or a route and therefore do not require a name/id for indexing.

Issues resolved

KAG-4005

Testing

• Unit tests
• E2E tests
• Manual testing on Universal
• Manual testing on Kubernetes

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.18%. Comparing base (1e34a0b) to head (486b477).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #103   +/-   ##
=======================================
  Coverage   41.18%   41.18%           
=======================================
  Files          74       74           
  Lines       10802    10802           
=======================================
  Hits         4449     4449           
  Misses       5891     5891           
  Partials      462      462           

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