Replace lazy_static with once_cell

[Sciencentistguy]

Once cell is better than lazy_static in a few ways:

• it doesn't use macros
• it is more maintained (lazy_static is only passively maintained)
• it is based on a Rust RFC (standard lazy types rust-lang/rfcs#2788)
• it is more performant

[sylvestre]

Looks great
Maybe add it to
https://github.com/uutils/coreutils/blob/main/deny.toml
to make sure it isn't used in the future too
https://embarkstudios.github.io/cargo-deny/checks/bans/index.html

[Sciencentistguy]

That can't be done as lazy_static is used by a bunch of crates that uutils/coreutils depends on

[sylvestre]

ok
could you please fix the rustfmt issue?

Error: ERROR: `cargo fmt`: style violation (file:'tests/by-util/test_chmod.rs', line:1; use `cargo fmt "tests/by-util/test_chmod.rs"`)
Error: ERROR: `cargo fmt`: style violation (file:'tests/by-util/test_chmod.rs', line:5; use `cargo fmt "tests/by-util/test_chmod.rs"`)
Error: ERROR: `cargo fmt`: style violation (file:'tests/by-util/test_ls.rs', line:12; use `cargo fmt "tests/by-util/test_ls.rs"`)
Error: ERROR: `cargo fmt`: style violation (file:'tests/by-util/test_ls.rs', line:18; use `cargo fmt "tests/by-util/test_ls.rs"`)

[sylvestre]

Still some warnings, could you please have a look? thanks