Prepare for k8s 1.25

[marians]

Towards https://github.com/giantswarm/giantswarm/issues/29470

What does this PR do?

Prepares the app to be deployed to gazelle / operations which is K8s 1.25 with PSS enforced.

In detail:

• Add security spec for PSS to deployments
• Add a switch to only render PSP resources if .Values.global.podSecurityStandards.enforced is not true
• Set namespace based on helm .Release.Namespace
• Change a registry to gsoci
• Remove an image pull policy (Always)

[marians]

Ran into this problem logged by the staticjscms pod:

/app/netlify-cms-github-oauth-provider/login_script.js:5
  throw new Error('process.env.ORIGIN MUST be comma separated list

The deployment had the ORIGINS env variable defined, but not ORIGIN, so I added it.

[marians]

https://github.com/vencax/netlify-cms-github-oauth-provider/blob/master/login_script.js#L5

Turns out the error message is mistyped and the env variable must be ORIGINS.

[mproffitt]

LGTM