Support /api/v1/format_query API

[friedrichg]

Is your feature request related to a problem? Please describe.
Support /api/v1/format_query

Describe the solution you'd like
This looks pretty straight forward as something that query-frontend should manage

Describe alternatives you've considered
None

Additional context
prometheus/prometheus#11036

[yeya24]

This API is already supported and exposed by Prometheus API Router.
I agree it is better to handle it in Query Frontend only but we should be able to enable it today on both Query Frontend and Querier by registering the route here.

[pnijem]

Hi

Does this issue still require handling? If so, can I take it?

[yeya24]

Yeah feel free to take it