svga: set PIPE_CAP_VERTEX_ATTRIB_ELEMENT_ALIGNED_ONLY for VGPU10 device

svga: set PIPE_CAP_VERTEX_ATTRIB_ELEMENT_ALIGNED_ONLY for VGPU10 device

Instead of forcing vertex buffer stride to be 4 byte aligned only,
DX10 actually allows the stride to be non 4-byte aligned but the
alignment of an element must be the nearest power of 2 greater or equal to the
width of the element's format, or 4, whichever is less.  So the requirement is
better met with PIPE_CAP_VERTEX_ATTRIB_ELEMENT_ALIGNED_ONLY which if set to
TRUE, the sum of vertex element offset + vertex buffer offset + vertex buffer
stride must be aligned to the vertex attributes component size.
Note: PIPE_CAP_VERTEX_ATTRIB_ELEMENT_ALIGNED_ONLY cannot be set
with other alignment-requiring CAPs, so we have to return 0 for all the
other alignement CAPs.

This avoids some unnecessary software vertex translate fallback.

cc: mesa-stable

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22689>