chore(cuda): update cuda-backend with Virtual Memory Manager and NTT refactor

[gaxiom]

Updates openvm-cuda-backend with:

• Performance update for better GPU memory usage: feat(cuda): Virtual Pool Memory Manager stark-backend#114
• Refactor to avoid some sporadic issues with NTT params initialization: chore(cuda): Ntt refactoring stark-backend#123

[codspeed-hq]

CodSpeed WallTime Performance Report

Merging #2127 will not alter performance

_{Comparing fix/ntt-build (ddfba00) with main (6c11e67)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 30 untouched

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	269	322,610	2,058,654	-	-	-
fibonacci	(-68 [-6.7%]) 949	1,500,210	1,060,232	-	-	-
regex	(-273 [-9.3%]) 2,673	4,108,483	13,403,604	-	-	-
ecrecover	(-117 [-11.9%]) 864	140,497	2,274,628	-	-	-
pairing	(-68 [-4.5%]) 1,460	1,882,939	23,722,622	-	-	-

Commit: ddfba00

Benchmark Workflow