Implement a (new) 'helm' Ansible module

[NicolasT]

• Allow to set values in task
• Allow to keep values in files and injected (can use Ansible for this)
• Allow to set values in inventory, and apply using proper -f ... sequence
• Set repository, name, version,...

I think it'd make sense to first implement this inside MetalK8s, then later we may want to extract in a separate project/repository.

When the above functionality is implemented, #180 becomes possible as a side-effect.

[NicolasT]

@Zempashi Since you put this in 1.1.0 (which I was about to do now ;)), are you working on this? If so, please self-assign.

[Zempashi]

Yes, I do. We can move this for later release, I wasn't aware we had enough feature to release 1.1.0, it was just show that's something we want to work on "soonish". (And this will help #230)

[NicolasT]

Oh no, no 1.1.0 release planned soon, so this can definitely go in, and is indeed a good step to handle #230, #180 and others!