Simplify the install_uniffi_bindgen_go script

There's no need to manually clone the uniffi-bindgen-go repo and then
use the `cargo install` `--path` switch, we can use the `--git` option
directly.

This is also documented on the uniffi-bindgen-go
repo: https://github.com/NordSecurity/uniffi-bindgen-go/?tab=readme-ov-file#how-to-install

install_uniffi_bindgen_go.sh

@@ -1,6 +1,4 @@
 #!/bin/bash -e
 set -o pipefail
 
-git clone --depth 1 --branch main https://github.com/NordSecurity/uniffi-bindgen-go _temp_uniffi_bindgen_go;
-(cd _temp_uniffi_bindgen_go && git submodule init && git submodule update && cargo install uniffi-bindgen-go --path ./bindgen);
-rm -rf _temp_uniffi_bindgen_go;
+cargo install uniffi-bindgen-go --git https://github.com/NordSecurity/uniffi-bindgen-go