Improve reconciled resources

[xrstf]

Summary

This PR performs some general improvements to the reconciled resources:

• make test-e2e will now also enable the feature gate for the bundles, which makes it possible again to run the e2e tests locally.
• Missing readiness, liveness and startup probes were added to all Deployments, inspired by the values from the kcp Helm charts.
• The front-proxy had mixed up liveness/readiness probes. Fixed.
• Some missing labels are now being added.
• A consistent security context is applied to all Deployments now.

What Type of PR Is This?

/kind feature

Release Notes

* Fixed missing labels in generated Kubernetes objects.
* Fixed wrong readiness/liveness probes on kcp-front-proxy Deployments.
* Add liveness/readiness/startup probes to the shard Deployments.
* All Deployments now specifiy a security context with a readonly filesystem, dropping all privileges and forbidding privilege escalations.

[ntnn]

/lgtm
/approve

[kcp-ci-bot]

LGTM label has been added.

Details

Git tree hash: acd10e3c68b76057c5faedd410d9f9ac5aa6a947

[xrstf]

/approve

[kcp-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ntnn, xrstf

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [xrstf]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment