[Multus]: Defaulting to thick image is a breaking change

[samip5]

It seems that the 5.0.2 chart defaults to an thick version of multus, but unfortunately, that's amd64 only making it breaking.

Tracking:

• fix multi-architecture for thick image k8snetworkplumbingwg/multus-cni#1027

[angelnu]

Since it has been a few weeks since I released the update to the new multus I am not sure how difficult it would be to support the think version in parallel to the tick one. I picked the thick since it was the recommended one from the Multus team but the missing multi-arch support is a severe limitation.

I do not have much time right now to look at this so I would suggest to stay on the previous version of the chart until either multus merges the multiarch support or I have a few hours to investigate the think version. A PR is also welcome!