feat(chart-updater): continuous deployment of OCI Helm chart type application

[distorhead]

Hi! There is a proposal to implement continuous deployment at the higher logical level than updating images: watch for a new helm chart versions and perform update (and included images will be updated as well). This proposal and possible solutions has been described in-depth in this issue: argoproj/argo-cd#8475.

In this PR I've created MVP to try one solution to the problem and get your feedback if possible.

How it works

Update application targetRevision for an OCI helm chart when new chart version arrives into the container registry based on semver constraints.

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 14.70588% with 87 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.08%. Comparing base (e46a206) to head (1df2f88).
⚠️ Report is 377 commits behind head on master-annotation-based.

Files with missing lines	Patch %	Lines
pkg/argocd/update.go	0.00%	76 Missing and 1 partial ⚠️
pkg/argocd/argocd.go	60.00%	9 Missing and 1 partial ⚠️

Additional details and impacted files

@@                     Coverage Diff                     @@
##           master-annotation-based     #405      +/-   ##
===========================================================
- Coverage                    65.55%   63.08%   -2.47%     
===========================================================
  Files                           21       21              
  Lines                         2032     2132     +100     
===========================================================
+ Hits                          1332     1345      +13     
- Misses                         571      656      +85     
- Partials                       129      131       +2     

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[bsg-toby]

@jannfis Could you please review this ? Thank you so much

[dtduc-git]

@jannfis Thanks in advance for your review.

[minhnnhat]

@jannfis We really need this feature!

[mxzinke]

@distorhead Could you accept the licensing and go forward with this feature?

[distorhead]

@distorhead Could you accept the licensing and go forward with this feature?

@mxzinke Hi! I am sorry for delayed response, accepted licensing.

[distorhead]

@jannfis Hi! What do you think about this feature? Does it have any problems with design?

[bsg-toby]

Hi @jannfis,

Could you please take a look on this PR ? Thanks.

[vietwow]

@alexmt @jannfis anyone could take a look this pr ? thanks

[asychev]

Any chance this will go forward?

[vietwow]

I really don't understand what's wrong with this PR and why repo maintainers like @jannfis don't care about this while many people are waiting for this.