Update Helm docs

[lucacome]

The Helm docs on the website are out of date. This PR updates the docs and adds to the release scripts to automate the process. The script will copy deployments/helm-chart/README.md to docs/content/installation/installation-with-helm.md and add the necessary tags for Hugo to work.

[codecov]

Codecov Report

Merging #3698 (76e1bcb) into main (45838e9) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3698      +/-   ##
==========================================
- Coverage   52.35%   52.33%   -0.03%     
==========================================
  Files          59       59              
  Lines       16880    16880              
==========================================
- Hits         8838     8834       -4     
- Misses       7747     7749       +2     
- Partials      295      297       +2     

see 1 file with indirect coverage changes

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[ciarams87]

Looks good! Does this mean that we will only have to modify deployments/helm-chart/README.md for Helm changes going forward? In other words, this will be the source of truth and so we should not modify docs/content/installation/installation-with-helm.md manually any more?

[lucacome]

@ciarams87 yep! deployments/helm-chart/README.md will be the source of truth and everything will be copied over to docs/content/installation/installation-with-helm.md

[ADubhlaoich]

Overall looks grand - though I've noticed a huge amount of instances where NGINX Ingress Controller is listed just as "Ingress Controller", such as in the parameters table.

It's not a blocker of any kind, but updating them for the proper noun would be ideal.