Methods of `Affine3` `to_transpose` and `inverse_transpose_3x3` are now part of an extension trait

With the addition of Affine3 on glam, Bevy's version was removed. To keep the functionality that Bevy's version provided we created the extension trait Affine3Ext. Locations that accessed Affine3::to_transpose or Affine3::inverse_transpose_3x3 will now need the extension trait to be in scope.