feat: Add support for defining user containers to HA chart

[as51340]

Release note

Users can now add containers which will be run aside from the main MG container on data instances and coordinators/

Related product PRs

PRs from product repo this doc page is related to:
memgraph/helm-charts#182

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Project	Deployment	Preview	Comments	Updated (UTC)
documentation	Ready	Preview	Comment	Nov 10, 2025 2:04pm