[release-1.16] Documentation refactor

[k8s-infra-cherrypick-robot]

This is an automated cherry-pick of #5088

/assign jackfrancis

Refactor documentation

[jackfrancis]

/lgtm
/approve

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 7c6dbbba12630433701840f6d7e5cc72956ddd17

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jackfrancis

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.19%. Comparing base (310808b) to head (b750c97).
Report is 5 commits behind head on release-1.16.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.16    #5094      +/-   ##
================================================
- Coverage         51.20%   51.19%   -0.01%     
================================================
  Files               273      273              
  Lines             24626    24626              
================================================
- Hits              12609    12607       -2     
- Misses            11228    11230       +2     
  Partials            789      789              

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[willie-yao]

/lgtm