Issue open-horizon#4141 - Allow both cluster-scoped agent and namespa…

[LiilyZhang]

…ce-scoped agent to be installed in the same k8s cluster

Pull Request Template

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
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How Has This Been Tested?

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Checklist:

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