Break lock and lower scale down timeout

Break the lock on a job if it's still queued and the runner that it
triggered was assigned to another job. This may cause leftover runners
to be created, but we scale those down in ~3 minutes.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

params/requests.go

@@ -136,6 +136,7 @@ type CreateInstanceParams struct {
 	// The runner group must be created by someone with access to the enterprise.
 	GitHubRunnerGroup string
 	CreateAttempt     int `json:"-"`
+	AditionalLabels   []string
 }
 
 type CreatePoolParams struct {