[installer] Allow extra service annotations for ide-proxy and openvsx-proxy

[andrew-farries]

Description

One of the Webapp team's epics for Q2 is to use the Gitpod installer to deploy to Gitpod SaaS. In order to do that we will need to add additional configuration to the installer to make the output suitable for a SaaS deployment as opposed to a self-hosted deployment.

This PR allows for extra annotations to configured on the ide-proxy and openvsx-proxy components so that we can configure GCP annotations for Gitpod SaaS.

It's exactly the same as #9773 but for the ide-proxy and openvsx-proxy components.

Related Issue(s)

Part of #9097

How to test

Create an installer config file containing this experimental section:

experimental:
  ide:
    ideProxy:
      serviceAnnotations:
        someKey: someValue
    openvsxProxy:
       serviceAnnotations:
        someKey2: someValue2

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 Service resources for ide-proxy and openvsx-proxy will contain the extra annotation.

Release Notes

Allow setting `ide-proxy` and `openvsx-proxy` service annotations via the installer.

Documentation

None.

[akosyakov]

lgtm