Reduce duplication between monitor anomaly and time_series components

Summary

Due to MR !16530 (merged)

There is a high-level of duplication between:

app/assets/javascripts/monitoring/components/charts/anomaly.vue

app/assets/javascripts/monitoring/components/charts/time_series.vue

We should make these components a) more composable and b) possibly have anomaly wrap around time_series.