IR-367: add networkResourceGroupName to azure network access internal config

[flavianmissi]

I overlooked the fact that users might bring their own networks using a different resource group.
This takes care of it.

[openshift-ci-robot]

@flavianmissi: This pull request references IR-367 which is a valid jira issue.

In response to this:

I overlooked the fact that users might bring their own networks using a different resource group.
This takes care of it.

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[openshift-ci]

Hello @flavianmissi! Some important instructions when contributing to openshift/api:
API design plays an important part in the user experience of OpenShift and as such API PRs are subject to a high level of scrutiny to ensure they follow our best practices. If you haven't already done so, please review the OpenShift API Conventions and ensure that your proposed changes are compliant. Following these conventions will help expedite the api review process for your PR.

[JoelSpeed]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: flavianmissi, JoelSpeed

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[flavianmissi]

/test e2e-azure