[installer] Separate webapp tracing config from workspace tracing config

[andrew-farries]

Description

Currently, the tracing related environment variables JAEGER_SAMPLER_TYPE and JAEGER_SAMPLER_PARAM are configured under experimental.workspace.tracing and are applied to these components:

pkg/components/agent-smith/daemonset.go
pkg/components/blobserve/deployment.go
pkg/components/content-service/deployment.go
pkg/components/image-builder-mk3/deployment.go
pkg/components/registry-facade/daemonset.go
pkg/components/server/deployment.go
pkg/components/ws-daemon/daemonset.go
pkg/components/ws-manager-bridge/deployment.go
pkg/components/ws-manager/deployment.go
pkg/components/ws-proxy/deployment.go

This PR makes the server component take it's tracing config from a new experimental.webapp.tracing config, as it should not (necessarily) use the same config as the the workspace components.

See this comment.

Related Issue(s)

Part of #9097

How to test

Create an installer config file containing this experimental section:

experimental:
  webapp:
    tracing:
      samplerType: probabilistic
      samplerParam: 12.5
  workspace:
    tracing:
      samplerType: remote
      samplerParam: 10.5

Get a versions.yaml for use with the installer:

docker run -it --rm "eu.gcr.io/gitpod-core-dev/build/versions:${version}" cat versions.yaml > versions.yaml

Then invoke the installer as:

go run . render --debug-version-file versions.yaml --config /path/to/config --use-experimental-config

The server and workspace components will use the correct environment variables from the correct section of the config.

Release Notes

Separate tracing installer config for the server and workspace components

Documentation

None

[geropl]

👍