When drawing the driver editor, only skip drawing the "scrubbing area"
and not the Y-axis values or the scroll bars.
The issue was introduced in rBb3431a88465db2433b46e1f6426c801125d0047d
to avoid drawing the playhead in the Driver Editor but also prevented
the text on the y axis from being drawn.
Reviewed by: Severin, sybren
Maniphest Tasks: T95531
Differential Revision: https://developer.blender.org/D14022
ea3b2e8736