Mixin: add Grafana dashboard for query frontend

[yeya24]

Is your proposal related to a problem?

We are running thanos query frontend, but we don't have a dashboard for it right now. It would be very nice to have one dashboard to monitor the cache status, requests, etc.

Describe the solution you'd like

Add a dashboard for query frontend to the mixin

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[stale]

Closing for now as promised, let us know if you need this to be reopened! 🤗

[bistaastha]

Hi. I will be working on this :)

[yeya24]

@bistaastha That would be great! Please let me know if you have any questions.

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[bistaastha]

Hi. I will be getting back to this issue after another week and will update the status here.
Apologies for getting sidetracked from this.

[vanugrah]

Hey folks - any updates on this? Would be quite useful to have.

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[bistaastha]

Hi @yeya24 ! I have been unable to work properly on this. So can you please unassign me?

[jessicalins]

hey @yeya24 I'd like to work on this :)

[jessicalins]

I've added a PR with some basic metrics here: #4856

[GiedriusS]

@jessicalins thank you for your work! I think we can close this now 💪