Maya: Fix Extract Look with space in names

[BigRoy]

Brief description

This fixes #2055.

With this changed the source and destination filepath is now escaped with " quotes in the call to subprocess when a space is in the path. We're also doing this for the sourceHash argument since that uses the filename as part of the hash and had the same issue.

Testing notes:

1. Publish a look that uses a texture with a space in filename.
2. Assign the look

Tested

I've tested the publishing plus look assignment. It looks solid on my end. 👍

[antirotor]

Works, thanks!