Only get stats and autoscale deployments with model annotation

[samos123]

Currently this will be seen in the logs

Kubernetes service which has no deployment:

2024/02/10 19:51:42 Average for deployment: kubernetes: 0 (ceil: 0), current wait count: 0
2024/02/10 19:51:42 SetDesiredScale(0), current: -1, min: 0, max: 0
2024/02/10 19:51:42 Scaling up to 0 immediately                                                                 
2024/02/10 19:51:42 Scaling model "kubernetes": 0                                                               
2024/02/10 19:51:42 error scaling: get: Deployment.apps "kubernetes" not found
2024/02/10 19:51:42 Is leader, autoscaling       
2024/02/10 19:51:42 Average for deployment: lingo: 0

Lingo which has a deployment but no annotation:

2024/02/10 19:51:45 Average for deployment: lingo: 0 (ceil: 0), current wait count: 0
2024/02/10 19:51:45 SetDesiredScale(0), current: -1, min: 0, max: 0
2024/02/10 19:51:45 Scaling up to 0 immediately
2024/02/10 19:51:45 Scaling model "lingo": 0
2024/02/10 19:51:45 error scaling: not scaling deployment "lingo": deployment has no models annotation

Expected behavior:

• The stats should only be retrieved for deployments that are actively managed by lingo any other deployments should be ignored -> ignore all deployments that do not have the model annotation

Note that solving #59 might solve this issue as well. Both could potentially be tackled in the same PR, but doesn't have to be. There might a much smaller simpler fix for this issue vs #59