Revert magicbytes (-M) check for print conversion

[rocodes]

Status

Ready for review

Description

Fixes #2172 (comment) and adds additional sample files of varying formats to our libreoffice integration tests.

Test Plan

• CI is passing
• Visual review

Checklist

If these changes modify code paths involving cryptography, the opening of files in VMs or network (via the RPC service) traffic, Qubes testing in the staging environment is required. For fine tuning of the graphical user interface, testing in any environment in Qubes is required. Please check as applicable:

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[rocodes]

In theory, wmf files should be supported, but the mimetype that's listed as supported in libreoffice is image/x-wmf and the mimetype of the sample file is image/wmf even though it was created in libreoffice. 🙃 Libreoffice can in fact convert the file, but we'd have to hardcode in the support, which I don't love.

My suggestion would be to file a followup issue for these cases and figure out what to do, rather than trying to work around the behaviour of the tools we're using. But it's annoying. The same is true for the image/emf type.

[legoktm]

Thanks, this looks good. I like that as we increase file type support we can just move files from the unsupported folder to supported :)

[legoktm]

I was going to flag this but I realized it was already used in the code and you just moved it.

For the future let's not depend on what the current directory is since people can run pytest from export or export/tests, instead something like Path(__file__).parent.parent / "files" / "samples_supported"...