Add rustup

Author: Luni-4

.taskcluster.yml

@@ -41,8 +41,7 @@ tasks:
             - "-cx"
             - "git clone --recursive --quiet ${repository} &&
                cd rust-code-analysis &&
-               apk --no-cache add curl &&
-               curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh &&
+               apk --no-cache add rustup &&
                rustup target add x86_64-unknown-linux-musl &&
                cargo build --release --workspace --all-features --target x86_64-unknown-linux-musl"
         metadata: