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/inject_bootnodes.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# this script runs the polkadot-collator after fetching
+# this script runs the polkadot-parachain after fetching
 # appropriate bootnode IDs
 #
 # this is _not_ a general-purpose script; it is closely tied to the
@@ -8,7 +8,7 @@
 
 set -e -o pipefail
 
-ctpc="/usr/bin/polkadot-collator"
+ctpc="/usr/bin/polkadot-parachain"
 
 if [ ! -x "$ctpc" ]; then
     echo "FATAL: $ctpc does not exist or is not executable"