[tempo-distributed] Added support for OTLP gRPC ingest on gateway.

[dipu018]

Background: The gateway deployed by tempo-distributed helm chart did not support ingest over gRPC for OTLP.
Changes:

• added additionalPorts to gateway deployment so that port 4317 can be exposed if needed.
• added gRPC on 4317 in nginx config to route to distributor endpoint.

Use:

gateway:
  additionalPorts: 
    - name: grpc-otlp
      port: 4317
      protocol: TCP
  service:
    additionalPorts: 
      - name: grpc-otlp
        port: 4317
        targetPort: 4317
        protocol: TCP

Tested with Telemetrygen v0.104.0.

[dipu018]

Fixes issues #1389 and #733

[Sheikh-Abubaker]

Could you please address the failed CI lint tests, Thank you!

[tshuma1]

will this be merged anytime soon ?

[Sheikh-Abubaker]

will this be merged anytime soon ?

All the checks and conflicts must be resolved before merging.

[tshuma1]

will this be merged anytime soon ?

All the checks and conflicts must be resolved before merging.

guess i'll fork this and fix

[Sheikh-Abubaker]

guess i'll fork this and fix

I'd suggest let @dipu018 try first and then we'll see.