docker-compose: add otel-collector by default, disable jaeger by default

[bobheadxi]

Removes Jaeger from the default docker-compose deployment, and replaces it with OpenTelemetry Collector configured to log data only.

With the jaeger/docker-compose.yaml overlay, a Jaeger instance can be deployed and otel-collector will be configured to send traces to the deployed Jaeger instance.

The pure-docker version of this change is in #849

Closes sourcegraph/sourcegraph#40455

Checklist

• Sister deploy-sourcegraph change: Replace Jaeger tracing with OpenTelemetry and make Jaeger's backend deploy-sourcegraph#4163
• All images have a valid tag and SHA256 sum

Test plan

docker-compose \
    -f docker-compose/docker-compose.yaml \
    -f docker-compose/jaeger/docker-compose.yaml \
    -f docker-compose/dev/docker-compose.yaml up

{
    "observability.tracing": { "type": "opentelemetry" }
}

[sanderginn]

It all looks good to me.

Is this repository meant to serve as a public deployment method? If so, we might want to offer means to set a custom otel config.

[bobheadxi]

Is this repository meant to serve as a public deployment method? If so, we might want to offer means to set a custom otel config.

Yes - I added a mounted-by-default template similar to your approach in sourcegraph/deploy-sourcegraph#4163: 0b2f378

[sanderginn]

LGTM

[burmudar]

Suggested change

	# Configure collector to send traces to Jaeger
	# Configure collector to send traces to Jaeger
	# By default listens on the following ports:
	# - grpc 4317
	# - http 4318

[bobheadxi]

This is already indicated on docstring for the underlying service configuration in the base docker-compose.yaml file, so I think we should be fine to omit this here

[michaellzc]

docker compose stuff looks good to me, but how about our pure docker distro? https://github.com/sourcegraph/deploy-sourcegraph-docker/tree/master/pure-docker

I know there has not been much clear signal how to better support pure-docker distro in the future, but I do think we should back-port these changes to pure-docker as well.

[bobheadxi]

pure-docker changes are here: #849 with some slight variations (still in draft)