Devmode to Reduce compilation time (including G2 and ECNTT)

[vhnatyk]

Describe the changes

Introduces 'develop' mode - with reduced -O0 optimizations instead of -O3 and disabled inlining and loop unrolling
with slightly lower performance but much reduced build time (6 minutes vs reported 163 minutes on i9 13900K? for all curves)

Linked Issues

Resolves #316

[DmytroTym]

If we just disable the mixed-radix EC NTT and only use radix-2, would that give a further significant speedup?

[vhnatyk]

umm - like still ~80% compilation time it's msm.cu g2 - also weird C++ gtests fail but rust all passing, and didn't expect that unroll commenting to improve times - hoped #pragma unroll 1 was supposed to but it even increases the time by 10%. Maybe enable g2 and new ecntt only on final merge to main

[yshekel]

I don't think mixed-radix NTT is compiled for ECNTT here since it's not instantiated.
The following commit is instantiating it:
e1ff687

[vhnatyk]

oh right - I forgot to also push merged e1ff687 I tested locally

[yshekel]

I think 163 minutes was when building ECNTT for mix-radix algorithm so I am not sure this is the case.
Can you locally build it with and without devmode for a specific curve and tell the difference.

[yshekel]

Approving based on the answers. Note that I wrote a minor comment about the commented mixed-radix ECTT. You can ignore it if you want.

[LeonHibnik]

TODO add devmode to golang