pure-docker: remove jaeger entirely

[bobheadxi]

#849 took a conservative approach to https://github.com/sourcegraph/sourcegraph/issues/40455 by keeping Jaeger around. I've since reached out to the only customer using this deployment mechanism (https://sourcegraph.slack.com/archives/C012V43N8E7/p1662138872279299) which indicates there is no strong interest in keeping Jaeger around, so this change removes it entirely.

Checklist

• [ ] Sister deploy-sourcegraph change:
• [ ] All images have a valid tag and SHA256 sum

Test plan

CI passes