Reimplement notice file generation for third-party licenses through Rust, now with CEF credits (#3808)

tools/third-party-licenses/build.rs

@@ -0,0 +1,15 @@
+fn main() {
+	println!("cargo:rerun-if-changed=src");
+
+	println!("cargo:rerun-if-env-changed=DEP_CEF_DLL_WRAPPER_CEF_DIR");
+	if let Ok(cef_dir) = std::env::var("DEP_CEF_DLL_WRAPPER_CEF_DIR") {
+		println!("cargo:rustc-env=CEF_PATH={cef_dir}");
+	}
+
+	let manifest_dir = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+	if std::env::var("CARGO_FEATURE_DESKTOP").is_ok() {
+		let _ = std::fs::remove_file(manifest_dir.join("desktop.hash"));
+	} else {
+		let _ = std::fs::remove_file(manifest_dir.join("web.hash"));
+	}
+}