Add UI_GetDeployment Endpoint

[andrew-hashicorp]

This PR adds a UI_GetDeployment endpoint for use on the front end as proposed in this RFC. These UI convenience methods return a DeploymentBundle, which contains a deployment with its associated artifact, build, deployUrl, jobDataSourceRef, and latestStatusReport.

This PR also moves the code responsible for creating a DeploymentBundle out of UI_ListDeployments into a utility method, getDeploymentBundle that is then shared by both UI_GetDeployment and UI_ListDeployments.

To run relevant tests:

go test -test.v ./pkg/server/singleprocess -count=1 -run TestHandlers/ui_deploy/TestServiceUI_Deployment_GetDeployment

go test -test.v ./pkg/server/singleprocess -count=1 -run TestHandlers/ui_deploy/TestServiceUI_Deployment_ListDeployments

To test on your local server:

grpcurl -insecure -H "client-api-protocol: 1,1" -H "authorization: YOUR_AUTH_TOKEN" -d '{"ref": { "id": "A_DEPLOYMENT_ID" } }' 127.0.0.1:9701 hashicorp.waypoint.Waypoint.GetDeployment

To get your auth token:

waypoint context inspect -json YOUR_LOCAL_WAYPOINT_CONTEXT_NAME

To get your deployments, so you can get a deployment ID:

grpcurl -insecure -H "client-api-protocol: 1,1" -H "authorization: YOUR_AUTH_TOKEN" -d '{"application": { "application": "YOUR_APPLICATION_NAME", "project": "YOUR_PROJECT_NAME" } }' 127.0.0.1:9701 hashicorp.waypoint.Waypoint.ListDeployments

[izaaklauer]

Great work on this! One quibble with a log message, but the functionality looks spot-on.