Update taskscaler/fleeting metric collectors configuration

What does this MR do?

Updates fleeting and taskscaler (and their Prometheus metrics collector implementations) versions.

Why was this MR needed?

This is done to get update added in gitlab-org/fleeting/fleeting!9 (merged), gitlab-org/fleeting/taskscaler!17 (merged) and gitlab-org/fleeting/taskscaler!20 (merged) which is needed for proper monitoring of the runners.

What's the best way to test this MR?

What are the relevant issue numbers?