add logging in querier when live tailing request starts and ends (#4783)
add logging in querier when live tailing request starts and ends (#4783)

* add logging in querier when live tailing request starts and ends

* Suggested changes

Co-authored-by: Danny Kopping <6567a070590f0a10f7bc50e77868bc9e61a8d9d8@gmail.com>

* Update pkg/querier/http.go

Co-authored-by: Susana Ferreira <8436043566a5fd82cc59d8fbb730760f452f9ab1@gmail.com>

Co-authored-by: Danny Kopping <6567a070590f0a10f7bc50e77868bc9e61a8d9d8@gmail.com>
Co-authored-by: Susana Ferreira <8436043566a5fd82cc59d8fbb730760f452f9ab1@gmail.com>
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki