tools: use a shallow clone of the npm/cli repository

Use a shallow clone instead of cloning the whole repository.

PR-URL: #38463
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

tools/update-npm.sh

@@ -24,12 +24,11 @@ mkdir -p "$WORKSPACE"
 
 cd "$WORKSPACE"
 
-git clone git@github.com:npm/cli.git
+git clone --depth=1 --branch="v$NPM_VERSION" git@github.com:npm/cli.git
 cd cli
 
 echo "Preparing npm release"
 
-git checkout v"$NPM_VERSION"
 make
 make release