[installer] Remove default workspace template

[corneliusludmann]

Description

With this change, the installer does not add the default workspace template (e.g. default DNS settings) when no workspace template is given. The old implementation even overwrote the self-configured settings.

Related Issue(s)

Fixes #8221

How to test

docker create -ti --name installer eu.gcr.io/gitpod-core-dev/build/installer:clu-installer-don-8221.0
docker cp installer:/app/installer ./installer
docker rm -f installer
./installer init > gitpod.config.yaml
./installer render --config gitpod.config.yaml > gitpod.yaml

Verify that workspace-templates configmap has no templates like this:

apiVersion: v1
kind: ConfigMap
metadata:
  creationTimestamp: null
  labels:
    app: gitpod
    component: ws-manager
    gitpod.io/nodeService: ws-manager
  name: workspace-templates
  namespace: default

Release Notes

[installer] Installer does not set default nameserver settings for workspaces anymore

[codecov]

Codecov Report

Merging #8288 (b58fee9) into main (6497329) will decrease coverage by 23.63%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #8288       +/-   ##
==========================================
- Coverage   31.23%   7.60%   -23.64%     
==========================================
  Files          39      31        -8     
  Lines        5910    2171     -3739     
==========================================
- Hits         1846     165     -1681     
+ Misses       3923    2003     -1920     
+ Partials      141       3      -138     

Flag	Coverage Δ
components-gitpod-cli-app	11.17% <ø> (ø)
components-installer-raw-app	4.58% <ø> (?)
components-local-app-app-darwin-amd64	?
components-local-app-app-darwin-arm64	?
components-local-app-app-linux-amd64	?
components-local-app-app-linux-arm64	?
components-local-app-app-windows-386	?
components-local-app-app-windows-amd64	?
components-local-app-app-windows-arm64	?
components-supervisor-app	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...s/installer/pkg/components/ws-manager/configmap.go	24.37% <ø> (ø)
components/local-app/pkg/auth/auth.go
components/supervisor/pkg/terminal/ring-buffer.go
components/supervisor/pkg/supervisor/tasks.go
components/supervisor/pkg/supervisor/services.go
components/supervisor/pkg/ports/tunnel.go
components/supervisor/pkg/config/gitpod-config.go
components/supervisor/pkg/ports/served-ports.go
components/supervisor/pkg/supervisor/config.go
components/supervisor/pkg/terminal/terminal.go
... and 25 more

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