Add container resource caps enforcement for containers

[dkwon17]

Description

Add new fields in the DWOC:

config:
  workspace:
    containerResourceCaps:
      limits:
        cpu: ...
        memory: ...
      requests:
        cpu: ...
        memory: ...

which serve as maximum limits/requests for DevWorkspace containers.

This allows the admin to control a maximum limit, preventing a user from creating a DevWorkspace with a cpu/memory limit that is too high.

Additional context

Related issues:

• Allow for global configuration of workspace resource requests eclipse-che/che#23243
• https://issues.redhat.com/browse/CRW-9546

[dkwon17]

Fixed thanks to #1545