Fixed "NameError: name 'ftfy' is not defined" in Wan pipeline by directly importing ftfy.

[Alptimus]

What does this PR do?

Fixes # "NameError: name 'ftfy' is not defined" in Wan pipeline by directly importing ftfy.

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@asomoza and @sayakpaul

[a-r-r-o-w]

How does directly importing it fix the problem of a missing package?

The NameError is expected if you don't have ftfy installed. If you do, the conditional import will work as expected and import it