Replace lazy_static with std::sync::LazyLock (#16066)

Closes #15860 

Since rust std now supports LazyLock replacing lazy_static with it
reduce the external dependency.

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/fs/Cargo.toml

@@ -20,7 +20,6 @@ futures.workspace = true
 git.workspace = true
 git2.workspace = true
 gpui.workspace = true
-lazy_static.workspace = true
 libc.workspace = true
 parking_lot.workspace = true
 paths.workspace = true

crates/fs/src/fs.rs

@@ -794,9 +794,8 @@ impl FakeFsState {
 }
 
 #[cfg(any(test, feature = "test-support"))]
-lazy_static::lazy_static! {
-    pub static ref FS_DOT_GIT: &'static OsStr = OsStr::new(".git");
-}
+pub static FS_DOT_GIT: std::sync::LazyLock<&'static OsStr> =
+    std::sync::LazyLock::new(|| OsStr::new(".git"));
 
 #[cfg(any(test, feature = "test-support"))]
 impl FakeFs {