ui: limit number of deployments requested

[jgwhite]

Why the change?

Closes #2919

What’s the plan?

• Set limit on OperationOrder in UI_ListDeployments request
• Document the results in this PR

What does it look like?

Before

~10s for ~50 deployments

After

~2s for the latest 10 of ~50 deployments (still pretty slow, but tolerable)

How do I test it?

1. Generate lots of deployments on a Waypoint server of your choosing
2. git checkout ui/deployments-limit
3. cd ui && yarn start local
4. Visit http://localhost:4200
5. Navigate to the app in question
6. Verify that the loading time is tolerable

[github-actions]

Ember Asset Size action

As of caf6830

Files that got Bigger 🚨:

File	raw	gzip
waypoint.js	+15 B	+4 B

Files that stayed the same size 🤷‍:

File	raw	gzip
vendor.js	0 B	0 B
vendor.css	0 B	0 B
waypoint.css	0 B	0 B

[briancain]

I am not frontend, but this change makes sense to me as a temporary workaround until we can fix that slow query 🙏🏻

[sabrinako]

Code looked good but just wanted to test on local first, definitely a shorter load time but do agree we need to do some more improvements to this endpoint's performance in the future