Add roc test --ignore-error flag

[horriblename]

closes #6622

adds new flag to allow tests to be run even if build errors occurred, like roc run

[Anton-4]

Looks good @horriblename, I just improved some names. Can you add a test that uses the ignore-build-errors flag?

[Anton-4]

Thanks @horriblename!

[horriblename]

@Anton-4 ci checks failed earlier as some commits are "partially verified", can you sign it again?

[Anton-4]

@Anton-4 ci checks failed earlier as some commits are "partially verified", can you sign it again?

I believe there was also a failure in the wasm tests but I'll run CI again and we'll see what happens 😄

[github-actions]

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