Refactor MainComponentUpdater

Issue: Refactorings to workspace container/script logic (#511503 - closed)

What does this MR do and why?

• Refactors Category:Workspaces MainComponentUpdater class
• Splits separate parts of container setup to separate methods: vars, endpoints, and command/args

References

• Refactorings to workspace container/script logic (#511503 - closed)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

N/A, just a refactor.

How to set up and validate locally

• Workspace reconciliation should still work without any regressions.