Maya: Fix multi-camera renders

[antirotor]

Fix

This is fixing publishing of multiple cameras render. When more cameras are enabled and <Camera> token is in image prefix path, every AOV enabled will be added for each camera and its subset name will be {family}{Task}{Subser}_<Camera>_<Aov> .

Close #1850

[antirotor]

btw there is super strange behaviour in Maya with <Camera> token. At least it works in Maya 2020 like this:

If you have <camera> token in image prefix (without capital C) maya won't detect it properly and change whole image prefix so it forcefully adds <Camera> at the beginning without you having a chance to do anything about it. Strange is that with other tokens it isn't that picky....

[mkolar]

I'd say this is good to merge now