Improve Reason parsing for Grafana alerts

[ZainRizvi]

The old Grafana reason looked like this:

[ var=max_queue_size labels={runner=linux.aws.h100} value=12 ], [ var=max_queue_time_mins labels={runner=linux.aws.h100} value=122 ], [ var=queue_size_threshold labels={runner=linux.aws.h100} value=0 ], [ var=queue_time_threshold labels={runner=linux.aws.h100} value=1 ], [ var=threshold_breached labels={runner=linux.aws.h100} value=1 ]

Now it'll look like:

[runner=linux.aws.h100] max_queue_size=12, max_queue_time_mins=122, queue_size_threshold=0, queue_time_threshold=1, threshold_breached=1