How to create this light stretching effect?

This has probably nothing to do with Photoshop, but with photography. Night photography is done with long exposures and the lights from moving cars show as streaks. Your second picture can be done by zooming during the exposure. That one could also be reproduced in Photoshop, as well as the mirror exposure in your last picture.

See also here: https://www.findingtheuniverse.com/long-exposure-photography-the-ultimate-guide/

The middle one looks kind of like a Radial Blur (Zoom), the other two seems to employ a long exposure. 

Hi, that is done in camera. Google "Zoom Burst".

/G