feat(gcp): add label to instances for cost and logs grouping

Previous behavior:
We couldn't search GCP logs using the instance name if that instance was
already deleted. And if we want to know how we're spending our budget its
also difficult to know if specific tests or type of instances are the one
responsible for a certain % of the costs

Fixes #5153
Fixses #5543

Expected behavior:
Be able to search logs using the test ID or at least the github reference,
and be able to group GCP costs by labels

Solution:
- Add labels to instances

.github/workflows/continous-delivery.yml

@@ -127,6 +127,7 @@ jobs:
           --container-mount-disk mount-path="/zebrad-cache",name=zebrad-cache-${{ env.GITHUB_SHA_SHORT }} \
           --machine-type ${{ env.MACHINE_TYPE }} \
           --scopes cloud-platform \
+          --labels=app=zebrad,environment=prod,github_ref=${{ env.GITHUB_REF_SLUG_URL }} \
           --tags zebrad
 
       # Check if our destination instance group exists already
@@ -207,4 +208,5 @@ jobs:
           --container-mount-disk mount-path='/zebrad-cache',name=zebrad-cache-${{ env.GITHUB_SHA_SHORT }} \
           --machine-type ${{ env.MACHINE_TYPE }} \
           --zone ${{ env.ZONE }} \
+          --labels=app=zebrad,environment=qa,github_ref=${{ env.GITHUB_REF_SLUG_URL }} \
           --tags zebrad

.github/workflows/deploy-gcp-tests.yml

@@ -163,6 +163,7 @@ jobs:
           --scopes cloud-platform \
           --metadata=google-monitoring-enabled=TRUE,google-logging-enabled=TRUE \
           --metadata-from-file=startup-script=.github/workflows/scripts/gcp-vm-startup-script.sh \
+          --labels=app=${{ inputs.app_name }},environment=test,github_ref=${{ env.GITHUB_REF_SLUG_URL }},test=${{ inputs.test_id }} \
           --tags ${{ inputs.app_name }} \
           --zone ${{ env.ZONE }}
           sleep 60
@@ -403,6 +404,7 @@ jobs:
           --scopes cloud-platform \
           --metadata=google-monitoring-enabled=TRUE,google-logging-enabled=TRUE \
           --metadata-from-file=startup-script=.github/workflows/scripts/gcp-vm-startup-script.sh \
+          --labels=app=${{ inputs.app_name }},environment=test,github_ref=${{ env.GITHUB_REF_SLUG_URL }},test=${{ inputs.test_id }} \
           --tags ${{ inputs.app_name }} \
           --zone ${{ env.ZONE }}
           sleep 60

.github/workflows/zcashd-manual-deploy.yml

@@ -64,6 +64,7 @@ jobs:
           --machine-type ${{ env.MACHINE_TYPE }} \
           --service-account ${{ env.DEPLOY_SA }} \
           --scopes cloud-platform \
+          --labels=app=zcashd,environment=qa,github_ref=${{ env.GITHUB_REF_SLUG_URL }} \
           --tags zcashd
 
       # Check if our destination instance group exists already