GHW for building and publishing docker images (#1391)

* add ghw and scripts for docker image deployment

* debug

* add permissions for content

* fix path to the bin folder

* add tags

* rename env

* fix path to docker file

* make polkadot-parachain executable

* fix typo

* fix more typos

* test

* revert back  use of  working directory

* mke bin executable in the artifacts folder

* use cd instead of working directory

* change path to cash

* fix path to cash

* change cache key

* delete old flows

* addressed PR comments

* fix path

* reorg docker files

cumulus/docker/scripts/build-injected-image.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-
-OWNER=${OWNER:-parity}
-IMAGE_NAME=${IMAGE_NAME:-polkadot-parachain}
-
-docker build --no-cache \
-    --build-arg IMAGE_NAME=$IMAGE_NAME \
-    -t $OWNER/$IMAGE_NAME \
-    -f ./docker/injected.Dockerfile \
-    . && docker images