Increase instanced draw testing.
Increase instanced draw testing.

Fill some gaps in the ANGLE end2end instanced draw test.
The only testing of points was on D3D11 and D3D11_FL9_3.
There was little testing of number of instances and different divisors.

Remove old one-off tests which are now redundant.

Disable the D3D11_FL9_3 points test which was passing purely by chance.
That code has bugs and only supports data from a buffer, while the
test uses data in client memory.

BUG=angleproject:2672

Change-Id: I5b5707a6fdd0960e81c25a2eb8ed96a1452d9868
Reviewed-on: https://chromium-review.googlesource.com/c/1450789
Commit-Queue: Frank Henigman <4f3ccfa167f952ff7263448ff4377acff6a23e5c@chromium.org>
Reviewed-by: Yuly Novikov <36f5580f63d0a3eacc17e89a61d11e2f646630d2@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle