fix(idempotency): make kafka-storage commands return correct changed_when status

[sverrehu]

Description

Before this PR, in KRaft mode, commands running kafka-storage had no explicit changed_when, so they would always report that they changed the system.

This PR sets changed_when: false for kafka-storage info and kafka-storage random-uuid, none of which changes anything on the hosts. It also sets changed_when for the kafka-storage format command, based on the output from the command.

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?

Tested in our local provisioning pipeline.

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

[sverrehu]

*knock, knock*