Push edge Helm Chart to OCI registries

[lucacome]

Updates the workflow to start using OCI registries for the edge Helm Chart.

[ADubhlaoich]

Pretty much everything I would've commented on is something someone else already covered: looks good to me.

[codecov-commenter]

Codecov Report

Merging #3581 (ab24480) into main (96e1fe4) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head ab24480 differs from pull request most recent head f840de7. Consider uploading reports for the commit f840de7 to get more accurate results

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@@           Coverage Diff           @@
##             main    #3581   +/-   ##
=======================================
  Coverage   52.24%   52.25%           
=======================================
  Files          59       59           
  Lines       16873    16834   -39     
=======================================
- Hits         8816     8797   -19     
+ Misses       7762     7740   -22     
- Partials      295      297    +2     

Impacted Files	Coverage Δ
internal/k8s/configuration.go	95.43% <0.00%> (-0.37%)	⬇️
pkg/apis/configuration/validation/policy.go	91.16% <0.00%> (-0.25%)	⬇️
internal/configs/virtualserver.go	95.07% <0.00%> (-0.01%)	⬇️
cmd/nginx-ingress/main.go	0.00% <0.00%> (ø)
internal/configs/configurator.go	38.67% <0.00%> (ø)
internal/configs/version2/http.go	0.00% <0.00%> (ø)

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[shaun-nx]

Looks good to me 👍
There are two outstanding comments from @ciarams87 to update the README that should be change before merging.