Add support for configuring namespaces

[FalconerTC]

Proposed changes

Currently, almost all resources being supplied by these charts are defaulting to .Release.Namespace. This is generally fine, but it's not configurable, and it doesn't support Gitops because helm template does not add .Release.Namespace for manifests (helm/helm#3553). The result is that if you try to create the manifests and then apply them without using helm install, everything will be put in the default namespace

This makes Namespace explicit on all relevant resources.

Types of changes

What types of changes does your code introduce?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I have read the CLA
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

[hvaghani221]

@FalconerTC can you fix failed tests?

[FalconerTC]

@harshit-splunk I can't seem to get the e2e tests to work. Any advice here?

[hvaghani221]

LGTM!