Add resources health checks to the argocd repo

[f41gh7]

argocd allows to bundle health checks for custom resources in order to track it's health status.

https://argo-cd.readthedocs.io/en/latest/operator-manual/health/#way-2-contribute-a-custom-health-check
https://github.com/argoproj/argo-cd/tree/master/resource_customizations

It'd be great to have track for our status resource field, that exposes actual state of the applications.

An example of lua script:

local hs = {}
if obj.status ~= nil then
	if obj.status.updateStatus ~= "operational" then
		hs.status = "Progressing"
		hs.message = obj.status.reason
		return hs
	end
	hs.status = "Healthy"
	hs.message = ""
	return hs
end
hs.status = "Progressing"
hs.message = "actual status is unknown"
return hs

[f41gh7]

FYI @Haleygo @AndrewChubatiuk

[AndrewChubatiuk]

depends on #1155