Silence logging in CI

[timleslie]

Currently on CI the output is spammed with log messages related to the migrations being run. In general we don't really care about these messages when testing, and they make it hard to see the actual error logs when there's a test failure.

This isn't a particularly elegant solution, but it gets the job done for now.

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🦋 Changeset detected

Latest commit: 974ac75

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@keystone-next/keystone	Patch
@keystone-next/test-utils-legacy	Patch

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