[tempo] feat: add readiness and liveness probe

[Mistral-valaise]

this change resolves #3185 by adding readiness and liveness probe configuration options to tempo helm chart

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[rim99]

What's the issue with this PR?
How can we merge this?

[Mistral-valaise]

i did it more than 5 months ago but unfortunately it was not reviewed. i will update the branch and validate all again

[joe-elliott]

thx for the PR! can you review the linting issues?

[Mistral-valaise]

i made the last 2 commits without signoff, since i had merged the main branch to mine afterwards, i have difficulties to validate DCO afterwards.
I could continue working on it during the weekend.
Can I create a new branch and do it again?

[Sheikh-Abubaker]

i made the last 2 commits without signoff, since i had merged the main branch to mine afterwards, i have difficulties to validate DCO afterwards. I could continue working on it during the weekend. Can I create a new branch and do it again?

Sure! you could open a new fresh PR.

[Mistral-valaise]

After reviewing the Grafana Tempo documentation (https://grafana.com/docs/tempo/latest/api_docs/#readiness-probe), I found that the /ready endpoint is available for readiness probes. However, there isn’t a specific endpoint designated for liveness probes. To address this, I propose using the /ready endpoint for the readiness probe and the /metrics endpoint for the liveness probe. Could you please share your thoughts on this approach?
Thank you for your consideration.
e.g
livenessProbe:
httpGet:
path: /metrics
port: 3100
initialDelaySeconds: 30
periodSeconds: 10

readinessProbe:
httpGet:
path: /ready
port: 3100
initialDelaySeconds: 5
periodSeconds: 10

[Mistral-valaise]

here is my new PR #3489