Allow setting new value in Helm values file

[jnovick]

• This was previously supported, but broke when the function was refactored to preserve order of yaml file (Fix/helm values wbc #748)
• Behavior does not change if overriding an existing value
• If the values file is empty or does not have a previous value, add the value instead of erroring

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.46%. Comparing base (0c9c0a9) to head (9090f65).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #838      +/-   ##
==========================================
- Coverage   73.47%   73.46%   -0.01%     
==========================================
  Files          31       31              
  Lines        3114     3128      +14     
==========================================
+ Hits         2288     2298      +10     
- Misses        692      694       +2     
- Partials      134      136       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[jnovick]

@jannfis I have published an image to my own registry and tested it works as desired and the tests also show that it works. Let me know if you want me to make any changes.

@askhari If you have concerns, let me know since you implemented the change that broke the ability to write to a new file. I want to make sure you are aware in case this breaks a behavior that you are expecting.

[askhari]

@jannfis I have published an image to my own registry and tested it works as desired and the tests also show that it works. Let me know if you want me to make any changes.

@askhari If you have concerns, let me know since you implemented the change that broke the ability to write to a new file. I want to make sure you are aware in case this breaks a behavior that you are expecting.

@jnovick , thank you for the notice :) . I see that now this fix is already merged. That's good news.
I didn't realize that I broke that behavior somehow. I tried to implement that piece of code to use its own workflow to avoid breaking things :| . As it was a new feature, at the beginning it was not intended to create new files or entries in the file because we didn't have that requirement. So, it's great that now it will allow to add new keys if needed.

Thank you for your help and improvement of the code :) .