Add Compute Capabillity 90 (Hopper) to the default cuda architectures

[ptheywood]

Adds SM 90 (Hopper) to our default CUDA Architecture values, so Hopper is targetted by default with CUDA >= 11.8.

In the future we might want to add an 11.8 wheel to the matrix for Hopper users, but in general anyone with hopper could build it for themselves (i.e. HPC only).

Ada (40 series) is SM 89 (i.e. it's closer to Ampere than Hopper), so we already target that major arch by default.

---

Configuring with CUDA 11.8 using the new default:

-- The CUDA compiler identification is NVIDIA 11.8.89
... 
-- Generating Compute Capabilities: 35;50;60;70;80;90

Configuring with CUDA 11.7 using the new default

-- The CUDA compiler identification is NVIDIA 11.7.99
...
-- Generating Compute Capabilities: 35;50;60;70;80

Building for 89,90 is fine and emits no new warnings. Unable to test execution though as we don't have the hardware.