[KED-2179] Hide random seed message unless using random data

[richardwestenra]

Description

Prevent the app from console.logging the random data message when random data is not being used as the data source

Development notes

This required scoping the seed generation so that it's only executed when the random data generator is called.

QA notes

Check the console with data=random vs e.g. data=demo

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added new entries to the RELEASE.md file
• Added tests to cover my changes

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[bru5]

Just a thought that I'd prefer utility than utils (or ideally, just random without that prefix on the functions), but that looks like it might require a bigger change than it's worth to be fair.