Rebrand various CI scripts and modules

This replaces Riot with Element in various CI scripts, modules, parameters, etc.
This _should_ be the last major rebranding pass (hopefully).

Fixes https://github.com/vector-im/element-web/issues/14894

scripts/ci/layered-riot-web.sh

@@ -1,31 +0,0 @@
-#!/bin/bash
-
-# Creates an environment similar to one that riot-web would expect for
-# development. This means going one directory up (and assuming we're in
-# a directory like /workdir/matrix-react-sdk) and putting riot-web and
-# the js-sdk there.
-
-cd ../  # Assume we're at something like /workdir/matrix-react-sdk
-
-# Set up the js-sdk first
-matrix-react-sdk/scripts/fetchdep.sh matrix-org matrix-js-sdk
-pushd matrix-js-sdk
-yarn link
-yarn install
-popd
-
-# Now set up the react-sdk
-pushd matrix-react-sdk
-yarn link matrix-js-sdk
-yarn link
-yarn install
-popd
-
-# Finally, set up riot-web
-matrix-react-sdk/scripts/fetchdep.sh vector-im riot-web
-pushd riot-web
-yarn link matrix-js-sdk
-yarn link matrix-react-sdk
-yarn install
-yarn build:res
-popd