Blender Git Loki

Fix T84642: Reassign effect-strip ignores animdata

When reassigning an effect strip to another sequence, any animation data
in the effect strip will not be offset like expected.

The fix calls `SEQ_offset_animdata` to offset the animation data after
the seqence has been moved.

Reviewed By: ISS

Maniphest Tasks: T84642

Differential Revision: https://developer.blender.org/D10096