#63932 Disable the failing Imagick tests

[johnbillion]

This temporarily disables failing Imagick tests prior to investigation.

Adds some missing WP_Error assertions too which means an error will be a failure instead.

Branches from #9746

Trac ticket: https://core.trac.wordpress.org/ticket/63932
Trac ticket: https://core.trac.wordpress.org/ticket/63876

[github-actions]

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[desrosj]

Few small comments, but looks good overall!

[desrosj]

Worth noting that this will eventually need to be changed to PHP < 8.1 should a security update be released for 8.1 & 8.2.

I think referencing the ticket is OK for now.

[aaronjorbin]

Would it be better to do this in the test where we can check the imagemagick version using Imagick::getVersion()? I don't have a strong opinion but it should make the concern about future containers go away

[desrosj]

This is suggested over in #9775

[johnbillion]

https://core.trac.wordpress.org/changeset/60736