Do not specify user id when generate Kubernetes Deployment for Workspace
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## Description
When we generate the Kubernetes resources(e.g. Deployment) from the devfile, we [explicitly set the user id that it should run as](https://gitlab.com/gitlab-org/gitlab/blob/7ce536de6bbb3f9469b9574b44e5c80b0c61bc5e/ee/lib/remote_development/workspaces/reconcile/output/devfile_parser.rb#L85). If memory serves me right, setting the `securityContext` in the pod configuration was a recommended security practice. However, what point does setting the `runAsUser` serve? Can we remove it?
Removing it would significantly simplify our documentation which is a mess right now.
## Acceptance Criteria
- [ ] A decision if we can remove `runAsUser` attribute of the security context. If the answer is no, the reason for it.
- [ ] Can we remove some other attributes as well?
## Technical Requirements
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