Previously we split it up into multiple commands to bind each descriptor
set individually. This required knowing how many dynamic offsets buffers
exist in each set, and some of the work happened at the time of the
command execution.

Now it's just a single simple data copying operation which doesn't need
to know how the dynamic offsets are distributed between the sets.

Bug: b/154522740
Change-Id: I0f094a7f91abc16e6bf971994426c104e8582c00
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/44329Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>