Enable F64 benefits for all capacities when reserving 64 CUs

[frithjof_v]

When reserving 64 CUs or more, we should be able to use the F64 benefits (Copilot, report readers without pro license, etc.) on any workspaces assigned to capacities which are backed by the reserved CUs.

Even if we create 2xF32, the workspaces assigned to those F32 capacities should get F64 benefits because these capacities are backed by 64 reserved CUs.

[Jonathan_Garris]

Thanks for the idea.