ci(rust): install openssl on windows via choco in pre-build.sh

The windows-latest runner doesn't have OpenSSL pre-installed in
the C:\Program Files\OpenSSL-Win64 directory anymore, causing
openssl-sys build to fail. Installing it via chocolatey fixes this.

Author: zeroshade

rust/ci/scripts/pre-build.sh

@@ -3,5 +3,6 @@
 set -ex
 
 if [[ "$2" == "windows" ]]; then
-    echo "OPENSSL_DIR='C:\Program Files\OpenSSL-Win64'" > .env.build
+    choco install openssl -y
+    echo "OPENSSL_DIR='C:\Program Files\OpenSSL'" > .env.build
 fi