Use {{ .Release.Namespace }} in ClusterRoleBinding subject namespace

[etutuit]

Is this a bug fix or adding new feature?
Bug fix

What is this PR about? / Why do we need it?
PR is about making subject namespace in ClusterRoleBinding generated based on the namespace release is being deployed to.

With previous hardcoded value of kube-system the test was failing because ServiceAccount didn't have proper permissions assigned, if it was deployed to different namespace than kube-system.

What testing is done?
It was deployed into test cluster and ended up with successful execution after deploying to custom namespace.

[linux-foundation-easycla]

• ✅login: etutuit / (ee96365)

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[ConnorJC3]

/ok-to-test
/lgtm

[github-actions]

Code Coverage Diff

This PR does not change the code coverage

[AndrewSirenko]

Thanks for the fix!

[AndrewSirenko]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AndrewSirenko

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