Remove mocklab references and replace with wiremock

[leeturner]

This PR updates all references to mocklab to wiremock

Submitter checklist

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• The PR request is well described and justified, including the body and the references
• The PR title represents the desired changelog entry
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• Test coverage that demonstrates that the change works as expected
• For new features, there's necessary documentation in this pull request or in a subsequent PR to wiremock.org