create scram users thru kafka-storage command

[piif]

Description

Creates scram users thru kafka-storage command when target is KRaft and not Zookeeper

Fixes #1495

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?

Checked on a new installation, with dédicated KRaft nodes

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
• If required, I have ensured the changes can be discovered by cp-ansible discovery codebase
• 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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[piif]

I just understood that I completly missed the point...
kafka-storage must be used only for a first admin user creation, when initializing kraft
Then, kafka-config must be used to create other users.
I put back this PR in draft mode and I'll work on a new version,

[mansisinha]

Thanks @piif for the contribution. However, there are some technical gaps in SCRAM in Kraft at the moment. Such as: Controller-controller communication does not support SCRAM auth, Controller-broker and broker-broker communication can support SCRAM which internally would require multiple authentication on single listener, which is not yet supported in CP-Ansible. We are working on it and plan to add SCRAM support in Kraft in future releases.