rename polkadot-collator to polkadot-parachain (#1241)

* rename polkadot-collator to polkadot-parachain

Not every node has to be a collator.

* Update README.md

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* rename docker file

* Update .github/workflows/extrinsic-ordering-check-from-bin.yml

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Versioning scheme that tracks polkadot relay chain

but allows for patch releases by having a 0 at the end.
(`-patch1` patch naming schemes were discussed but they
were judged to cause downstream packagers pain.)

* update name

* update lock file

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

docker/scripts/build-injected-image.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
 OWNER=${OWNER:-parity}
-IMAGE_NAME=${IMAGE_NAME:-polkadot-collator}
+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 | grep $IMAGE_NAME