not QgsPointXY as indicated by the documentation
Also add support for constructing QgsLineString using arrays of
arrays of floats, given that we're having to hand-roll sip conversion
code anyway!
Now the following is supported:
line = QgsLineString([[1,2], [3,4], [5,6]])
which is much nicer and more "pythonic" then the explicit
QgsPoint/QgsPointXY sequences!
Fixes#43200
2b6c3c1db2