feat(fluent-bit): add VPA controlledValues

[larrywax]

Allow customising VPA controlledValues option

[stevehipwell]

Thanks for the PR @larrywax, before a PR can be merged the chart changes annotations need updating. Also could you please provide some more context with links to justify the changes?

[larrywax]

Thanks for the PR @larrywax, before a PR can be merged the chart changes annotations need updating. Also could you please provide some more context with links to justify the changes?

Hi @stevehipwell, thanks for reviewing this PR. I'm sorry about the annotation, totally missed it.
Let me explain my company use case:
We use fluent-bit to parse and forward all the pods logs in our clusters. To accomodate higher load on biggest nodes, we have to set fairly high requests. The downside of this approach is that we waste quite a bit of resources on smaller nodes.
To solve this problem we would like to use VPA and leverage its InPlaceUpdate feature
Unfortunately, as stated in that doc, memory limit downscale requires a pod restart.
So, to wrap it up, we would like to instruct VPA to scale only the requests and leave the limits as we set them in the chart

[stevehipwell]

LGTM