client/scheduler: update NVidia detection again

[RichardHaselgrove]

for new RTX 30x0 range released September 2020

Description of the Change

GFLOPS peak is under-reported by a factor of 2 on the new cards, compared with other reporting tools

Alternate Designs

I've been asked if we could use NvAPI_GPU_GetGpuCoreCount() instead (available since 2014), but rejected as a more complex modification which might break backwards compatibility.

Release Notes
Correct detection of NVidia RTX30x0 range GPUs

[codecov]

Codecov Report

Merging #4031 (1600466) into master (24548b0) will decrease coverage by 10.28%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #4031       +/-   ##
============================================
- Coverage     16.66%   6.37%   -10.29%     
  Complexity      752     752               
============================================
  Files           134     276      +142     
  Lines         13131   35146    +22015     
  Branches       1492    1492               
============================================
+ Hits           2188    2241       +53     
- Misses        10827   32789    +21962     
  Partials        116     116               

Impacted Files	Coverage Δ	Complexity Δ
lib/coproc.cpp	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
sched/sched_limit.h	12.28% <0.00%> (-87.72%)	0.00% <0.00%> (ø%)
lib/msg_log.h	14.28% <0.00%> (-85.72%)	0.00% <0.00%> (ø%)
lib/sched_msgs.h	66.66% <0.00%> (-33.34%)	0.00% <0.00%> (ø%)
lib/sched_msgs.cpp	4.34% <0.00%> (-5.66%)	0.00% <0.00%> (ø%)
lib/msg_log.cpp	9.52% <0.00%> (-0.12%)	0.00% <0.00%> (ø%)
lib/parse.cpp	11.27% <0.00%> (-0.03%)	0.00% <0.00%> (ø%)
db/db_base.cpp	0.75% <0.00%> (-0.02%)	0.00% <0.00%> (ø%)
sched/credit.cpp	0.72% <0.00%> (-0.02%)	0.00% <0.00%> (ø%)
sched/sched_config.cpp	0.34% <0.00%> (-0.01%)	0.00% <0.00%> (ø%)
... and 158 more

[ChristianBeer]

Close and reopen to trigger CI and provide current build artifacts