COSI controller should have a recommended non-default namespace

[BlaineEXE]

Bug Report

What happened:

Currently, the COSI deployment manifest installs the cosi controller in default namespace. This is fine for a POC, but not for a stable project.

What you expected to happen:

COSI should have a recommended namespace for its controller install. Possibly objectstorage to match objectstorage.k8s.io domain.

How to reproduce this bug (as minimally and precisely as possible):

Anything else relevant for this bug report?:

Environment:

• Kubernetes version (use kubectl version), please list client and server:
• Sidecar version (provide the release tag or commit hash):
• Provisoner name and version (provide the release tag or commit hash):
• Cloud provider or hardware configuration:
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Network plugin and version (if this is a network-related bug):
• Others:

[bouaouda-achraf]

I can work on it ?
/assign