fix: use the correct zookeeper host for creating SCRAM users when hostname_aliasing_enabled=true

[givanov]

Description

When using hostname aliasing (hostname_aliasing_enabled=true) the create scram users tasks do not use the hostname aliases but instead the public hostname specified in the inventory. As such in cases where the machine we're running those tasks on can only talk to an internal interface and cannot to via the external one, the tasks fail. This PR addresses this by using the same hostname resolution for zookeeper in those tasks as the rest of the playbook

Fixes # (issue)

Type of change

• Bug fix (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)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Checklist:

• Any variable/code changes have been validated to be backwards compatible (doesn't break upgrade)
• I have added tests that prove my fix is effective or that my feature works
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• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

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✅ givanov
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