Fix schedule function deployment

[colerogers]

• Fixes schedule function deployment by always returning a retryConfig from init schedule trigger
• Fixes a bug in task queues where some properties of retryConfig and rateLimits were not resettable if the user supplied any options
• Fixes a bug in testLab where the reset-able endpoint options weren't being added in

[taeold]

hmm this would mean things like region would also be suggested in runWith which shouldn't be.

I wonder I made the mistake of setting preserveExternalChanges Deployment Option instead of Runtime Option. It doesn't sound right that preserveExternalChanges is a runtime option, but then that's the only way I can abuse runWith tag 😢

[colerogers]

Hmm yeah I figured this was a bug since I couldn't figure out a way to use preserveExternalChanges without making this change. Also, the v1 docs show preserveExternalChanges in the runtime options section - https://firebase.google.com/docs/functions/manage-functions#set_runtime_options

Should we just dump preserveExternalChanges into RuntimeOptions instead? That way we wouldn't have to fix any docs, but might not be the cleanest looking...

[taeold]

let's dump it in RuntimeOptions. I think runWith is already a dumping of options.

[taeold]

lgtm - would consider moving the preserveExternalChanges option to runtime options instead.