ci_: add go-generate-fast to nix

[igor-sirotin]

Added nix derivation for https://github.com/oNaiPs/go-generate-fast

Required for #5878

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	9ca475e	#1	2024-09-30 11:16:30	~3 min	tests-rpc	📄log
✔️	9ca475e	#1	2024-09-30 11:17:52	~4 min	linux	📦zip
✔️	9ca475e	#1	2024-09-30 11:18:32	~5 min	android	📦aar
✔️	9ca475e	#1	2024-09-30 11:18:44	~5 min	ios	📦zip
✔️	9ca475e	#1	2024-09-30 11:45:25	~32 min	tests	📄log

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.09%. Comparing base (2bbcce6) to head (9ca475e).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5890      +/-   ##
===========================================
+ Coverage    46.04%   46.09%   +0.04%     
===========================================
  Files          888      888              
  Lines       157381   157379       -2     
===========================================
+ Hits         72462    72538      +76     
+ Misses       76832    76542     -290     
- Partials      8087     8299     +212     

Flag	Coverage Δ
functional	11.37% <ø> (?)
unit	45.66% <ø> (-0.38%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 131 files with indirect coverage changes