Use LazyLock instead of now deprecated lazy_static

[grumbach]

Remove lazy_static = "1.4.0" dependency in all our Cargo.toml

And replace code using lazy_static:

#[macro_use]
extern crate lazy_static;

lazy_static! {
    static ref CONFIG: Config = {
        // Some expensive initialization
        Config::new()
    };
}

fn main() {
    println!("{:?}", *CONFIG);
}

by using LazyLock

use std::sync::LazyLock;

static CONFIG: LazyLock<Config> = LazyLock::new(|| {
    // Some expensive initialization
    Config::new()
});

fn main() {
    println!("{:?}", *CONFIG);
}