Blender Git Loki

Fix parenting objects to bones/vertices causes offset

This reverts part of rBbc5482337669.
Problem with above commit is that the evaluated object seems to not have
partype, par1, par2, par3 copied from the original (yet). Using original
object instead now.
Second issue (when parenting to 'Bone Relative') is that the bones
BONE_RELATIVE_PARENTING flag is set on the original, but not the
evaluated bone (yet), setting this on both now.

Fixes T60623 (and part of T59352)

Reviewers: brecht, sergey

Maniphest Tasks: T60623

Differential Revision: https://developer.blender.org/D4309