Add remoteStorageConfig variable to neon-storage-scrubber

[arpad-m]

Adds an object-typed remoteStorageConfig variable to neon-storage-scrubber.

Earlier PR: #88
Part of https://github.com/neondatabase/cloud/issues/19963

[skyzh]

I'll bump the version of the helm chart and regenerate docs before approval :) LGTM

[skyzh]

Using the config from the private repo, I get something like:

              env:
                - name: REMOTE_STORAGE_CONFIG
                  value:
                    container_name = "<redacted>"
                    container_region = "<redacted>"
                    storage_account = "<redacted>"

I wonder whether this is valid yaml? I thought it should be something like

value: |
  <multi-line string>

hmm...

[skyzh]

https://stackoverflow.com/questions/3790454/how-do-i-break-a-string-in-yaml-over-multiple-lines

"Flow" scalar styles ( , ", ')
These have limited escaping, and construct a single-line string with no new line characters. They can begin on the same line as the key, or with additional newlines first, which are stripped. Doubled newline characters become one newline.

ahh, yaml is hard

[skyzh]

Manual testing:

helm template charts/neon-storage-scrubber -f ./input.yml > output.yml

cat output.yml | yq  '.spec.jobTemplate.spec.template.spec.containers.[0].env.[0].value'