Create an umbrella charts for "polkadot-stack" and polkadot-parachain-stack"

[PierreBesson]

We should create dedicated charts to provide standardized deployment of polkadot and polkadot-parachain (cumulus). Those would be wrappers around the generic "node" helm-chart with values correctly set for their respective latest image tag as well as more comprehensive docs on how to correctly configure them.

• For simplicity, the chart version could be equal to the polkadot/cumulus release version.
• We need to find a way to semi-automate version upgrades.
• This is the opportunity to add end 2 end chart tests to validate that the node can connect to the network.

Update:
As agreed upon this comment, this chart will now be a polkadot-stack chart and polkadot-parachain-stack.

docker images in use to be wrapped with the umbrella chart:

• https://hub.docker.com/r/parity/polkadot (release)

• https://hub.docker.com/r/paritypr/polkadot-debug (debug)

• https://hub.docker.com/r/parity/polkadot-parachain

• https://hub.docker.com/r/paritypr/polkadot-parachain-debug

[BulatSaif]

This should be done after/together with #142 to avoid double work.

[PierreBesson]

@lazam do you have plans to work on this ?

[lazam]

@lazam do you have plans to work on this ?

I'm planning to work on this though we need to have some discussion about this to have better clarity on the roadmap, but if you want to pick this one then I'm good with it.

[lovelaced]

What are the current thoughts on this?

[PierreBesson]

PoC to be started soon.

[PierreBesson]

Closing in favor of #314 and #315