feat(integer): improve carry propagation algorithm

[tmontaigu]

Todo

• [x] Some inner comments
• [x] Some docstrings
• [x] Improve test to make sure both sequential and parallel algorithm are tested
• [x] Improve tests to use variable number of blocks
• [x] Check bench results
• [x] check correct algorimth is selected depending on number of CPU

[IceTDrinker]

the GPU crash is what you reported to the GPU team ?

[tmontaigu]

Yes the GPU crash is the thing I reported and a PR that has the fix has been openned