feat: make zarf-agent pods comply with offical restricted pod security standard

[Ansible-man]

Comply with k8s restricted pod security standard

Description

Adds security context to zarf-agent to ensure compliance with Kubernetes restricted pod security standard used in high security environments. ...

Related Issue

Fixes #2932

Relates to #

Checklist before merging

• [x] Test, docs, adr added or updated as needed
• [x] Contributor Guide Steps followed