Fix wasm build issues introduced by switching to wasi-sdk (#4407)

* Don't shell out for extracting tar.gz files

* Avoid wasi-sdk adding dependency on libc.so

* Clippy

* Fix -nostdlib flag

cli/loader/Cargo.toml

@@ -27,6 +27,7 @@ default = ["tree-sitter-highlight", "tree-sitter-tags"]
 anyhow.workspace = true
 cc.workspace = true
 etcetera.workspace = true
+flate2.workspace = true
 fs4.workspace = true
 indoc.workspace = true
 libloading.workspace = true
@@ -36,6 +37,7 @@ regex.workspace = true
 semver.workspace = true
 serde.workspace = true
 serde_json.workspace = true
+tar.workspace = true
 tempfile.workspace = true
 url.workspace = true
 ureq = "3.0.11"