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

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

crates/gpui/Cargo.toml

@@ -43,7 +43,6 @@ gpui_macros.workspace = true
 http_client.workspace = true
 image = "0.25.1"
 itertools.workspace = true
-lazy_static.workspace = true
 linkme = "0.3"
 log.workspace = true
 num_cpus = "1.13"