feat(app, app-shell): add ability to disable discovery cache

[sanni-t]

Closes #4853

overview

This PR adds ability to disable caching new robots to discovery.json using a toggle.

changelog

• added logic to disable caching robots to discovery.json on discovery.disableCache change
• added labeled toggle to NetworkSettingsCard
• attached state and dispatch props to turn caching on/off
• added toggle component tests
• added app-shell discovery tests that check caching behavior on config change

review requests

• Check if code looks good
• In discovery test, flow wasn't used initially and I have kept it that way. Should I update the file or let it continue without flow? Out of scope?
• Check if it works:
• Disable cache toggle component is populated on Network & System page with full description & is off by default
• Toggling it ON clears the cache & stops adding to cache
• If possible, introduce new instances of robots on the network and verify that they don't get added to discovery.json One way to mock this is by changing a connected robot's name (/server/name POST request with body {"name": "Some new name"})

risk assessment

Medium. Touches implementation of discovery logic but is quite a small change.

[mcous]

Looking good! Initial thoughts

[mcous]

Last two changes to get typechecking and tests passing

[mcous]

Code and behavior LGTM 🌵

[Kadee80]

works on my 🤖 !