#8753: load deployments on tabs immediately on startup

[twschiller]

What does this PR do?

• Closes #8753

Future Work

• Decide less confusing naming for page lifecycle (e.g., "load"/"reload" is ambiguous with window load, etc.)

Checklist

• [x] Added jest or playwright tests and/or storybook stories

For more information on our expectations for the PR process, see the code review principles doc