[CI] Expose WASM binaries on publish (#1093)

* add build-wasm-release CI job

* temporarily run build-wasm-release everywhere

* temporary job to inspect artifacts dir

* fix test job

* fix test job again

* remove temporary job

* remove FIXME for when to run jobs

* remove pointless echo

* Change cargo build for wasm-pack

* Checksum polkadot_cli files

* make separate wasm dir for artifacts

* fix nits