Support setting the webhook port and cert dir in the Helm chart

[adamdougal]

Closes #3444

What this PR does / why we need it:

Provides the ability to set the webhook port and cert dir when deploying using the helm chart. These options were added in #3442.

Special notes for your reviewer:

• In the linked issue it's mentioned that the port needs to be set in the conversion webhook section of the CRDs, however, these reference the service and the service port is unchanged.
• This chart does not work with the latest released version of the app and Docker image as they do not support these flags, so the release of this will need to wait until a new app release is cut. Alternatively, the implementation of this PR could be changed to only set these flags if they need to be overridden, rather than every time. I considered this option but favoured a simpler helm template.

How does this PR make you feel:

If applicable:

• this PR contains documentation
• this PR contains tests

[super-harsh]

@adamdougal #3444 is for ASOv2 helm chart and the changes in your PR are for ASOv1 helm chart. We have ASOv2 helm chart here for which we generate files using task target controller:gen-helm-manifest

[adamdougal]

@super-harsh Dang, I missed the charts dir under v2. I'll get this fixed up. Thanks

[adamdougal]

This had to be made more specific so not to clash with the new arg

[matthchr]

Thanks for the contribution, this looks good to me. I've kicked off E2E testing to ensure that passes but from my examination of the resulting Helm chart it should.

As you highlighted, we will hold off publishing a new chart until we also publish a new container image (probably later this week).

[matthchr]

/ok-to-test sha=3548499

[matthchr]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

Merging #3470 (3548499) into main (db857cf) will decrease coverage by 0.08%.
Report is 46 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3470      +/-   ##
==========================================
- Coverage   54.32%   54.24%   -0.08%     
==========================================
  Files        1566     1571       +5     
  Lines      655434   653199    -2235     
==========================================
- Hits       356073   354351    -1722     
+ Misses     241588   241283     -305     
+ Partials    57773    57565     -208     

see 196 files with indirect coverage changes