CLI: additional fake import tests (rebased onto dev_5_0)


This is the same as gh-2782 but rebased onto dev_5_0.

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This PR adds integration tests for the CLI import:
- of fake screens as created by `mkfake` (see https://github.com/openmicroscopy/bioformats/pull/1191)
- of pattern files (see https://github.com/openmicroscopy/bioformats/pull/1123)