Draft: Docs high side deployments

Docs
Trying to be vague yet useful to help set expectations/prereqs around high side deployments.
Heard some tips and tricks via word of mouth and am trying to document them.

Preview of the primary change that needs feedback:
https://repo1.dso.mil/platform-one/big-bang/bigbang/-/blob/docs_high_side_deployments/docs/guides/deployment_scenarios/high_side.md