[workspace] Cleanup unuse annotations and network policy

[iQQBot]

Description

Clean up workspace unuse annotations and network policy
annotations: IDE ports don't have metrics at all, and that's not how we scrape metrics in a production environment

		"prometheus.io/scrape":                  "true",
		"prometheus.io/path":                    "/metrics",
		"prometheus.io/port":                    strconv.Itoa(int(startContext.IDEPort)),

For network policy:
This setting only works in the preview environment, in prod, our monitoring is in another workspace, so this has no effect
network policy part replaced by gitpod-io/observability#121

Related Issue(s)

Fixes #

How to test

Start workspace, everything should be work as usally

Release Notes

NONE

Documentation

• /werft withObservabilityBranch=pd/ws-metrics

[iQQBot]

/werft run

👍 started the job as gitpod-build-pd-cleanup-ws.3
(with .werft/ from main)

[sagor999]

This looks good, but to be extra safe, I am going to put a hold and wait until @aledbf can confirm it is good as well.

/hold

[mustard-mh]

LGTM

[iQQBot]

Hi @aledbf could you have a look please?

[iQQBot]

/unhold