chore(dev/release): hold off publishing adbc_snowflake crate for now (

#2340)

This reverts commit 041f72d.

We want to hold off publishing the `adbc_snowflake` crate to crates.io
for now.

dev/release/post-08-rust.sh

@@ -42,12 +42,10 @@ main() {
 
   pushd "${SOURCE_TOP_DIR}/rust"
   cargo publish --all-features -p adbc_core
-  cargo publish -p adbc_snowflake
   popd
 
-  echo "Success! The released Cargo crates are available here:"
+  echo "Success! The released Cargo crate is available here:"
   echo "  https://crates.io/crates/adbc_core"
-  echo "  https://crates.io/crates/adbc_snowflake"
 }
 
 main "$@"