Rust

remove beam flake utilities from nix #27950

Job	Run time
Rust - build	5m 16s
Rust - build_docs	3m 49s
Rust - lint_cargo_readme	1m 22s
Rust - build_examples	5m 13s
Rust - test	21m 4s
Rust - lint_cargo_fmt_check	1m 18s
Rust - test_postgres	8m 41s
Rust - build_nightly	5m 34s
Rust - test_nightly	19m 28s
Rust - lint_cargo_clippy	4m 49s
Rust - build_release	13m 10s
Rust - lint_cargo_deny	1m 31s
Rust - lint_cargo_toml_files	1m 20s
Rust - check_cargo_update	3m 58s
Rust - lint_cargo_machete	1m 18s
Rust - check_no_std	4m 9s
Rust - ockam_command_cross_build (linux_armv7)	12m 20s
Rust - check_nightly	4m 26s
Rust - test_ockam_command (linux_86)	7m 54s
Rust - ockam_command_cross_build (macos_silicon)	9m 21s
	2h 16m 1s

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