gRPC health check "ValidationError: Health check matcher HTTP code cannot be empty"

[davidmytton]

Describe the bug
Specifying a health_check within a "aws-ecs" deploy block with a grpc_code causes a validation error requiring a matcher option that isn't relevant for gRPC health checks.

Steps to Reproduce
Use a waypoint.hcl file similar to:

deploy {
    use "aws-ecs" {
      ...
      health_check {
        path = "/health"
        grpc_code = 0
        interval = 30
        timeout = 10
      }
    }
  }

Will result in an error:

❌ Initializing deployment...
✓ Discovered service subnets
✓ Discovered alb subnets
✓ Using external security group decide-inbound
✓ Using specified security group IDs
❌ Initiating target group creation...2023-08-04T12:16:18.299+0100 [DEBUG] waypoint.runner: opening job stream: retry=false
2023-08-04T12:16:18.299+0100 [TRACE] waypoint.runner: sending job request
2023-08-04T12:16:18.299+0100 [INFO]  waypoint.runner: waiting for job assignment
2023-08-04T12:16:18.820+0100 [WARN]  waypoint: job failed: job_id=01H70469TQAJ6K3Z8PD4PRSAF7 code=Unknown
  message=
  | failed to create deployment resources: 2 errors occurred:
  |     * rpc error: code = Internal desc = failed to create target group: ValidationError: Health check matcher HTTP code cannot be empty
  |     status code: 400, request id: 530584ba-3875-4872-a22f-bf50b50cd385
  |     * Error during rollback: 1 error occurred:
  |     * argument cannot be satisfied: type: ecs.WorkspaceDestroy. This is a bug in the go-argmapper library since this shouldn't happen at this point.

Expected behavior

It should deploy the ALB with the configured gRPC health check.

Waypoint Platform Versions

$ waypoint --version  
CLI: v0.11.3 (2933d41)
Server: hcp v0.12.0

Additional context

If a matcher is provided, that also errors:

Unsupported argument; An argument named "matcher" is not expected here.