fix substrate-node-template generation (#2050)

# Description

This PR updates the node-template-release generation binary as well as
the `node-template-release.sh` file so that we can automatically push
updates to the [substrate-node-template
repository](https://github.com/substrate-developer-hub/substrate-node-template).
I assume this part was not updated after the substrate project has been
moved into the polkadot-sdk mono repo.

# Adjustments
- extend the `node-template-release.sh` to support the substrate
child-folder
- update the `SUBSTRATE_GIT_URL`
- fix the Cargo.toml filter (so that it does not include any
non-relevant .toml files)
- set the workspace-edition to 2021

# Note
In order to auto-generate the artifacts [this
line](https://github.com/paritytech/polkadot-sdk/blob/master/.gitlab/pipeline/build.yml#L320C15-L320C15)
needs to be included in the build.yml script again. Since I do not have
access to the (probably) internal gitlab environment I hope that someone
with actual access can introduce that change.
I also do not know how the auto-publish feature works so that would be
another thing to add later on.

---------

Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/scripts/ci/node-template-release.sh

@@ -3,7 +3,9 @@
 set -e
 
 export TERM=xterm
-PROJECT_ROOT=`git rev-parse --show-toplevel`
+SUBSTRATE_FOLDER="/substrate"
+GIT_ROOT=`git rev-parse --show-toplevel`
+PROJECT_ROOT=${GIT_ROOT}${SUBSTRATE_FOLDER}
 
 if [ "$#" -ne 1 ]; then
   echo "node-template-release.sh path_to_target_archive"
@@ -11,6 +13,6 @@ if [ "$#" -ne 1 ]; then
 fi
 
 PATH_TO_ARCHIVE=$1
-cd $PROJECT_ROOT/scripts/ci/node-template-release
 
+cd $PROJECT_ROOT/scripts/ci/node-template-release
 cargo run $PROJECT_ROOT/bin/node-template $PROJECT_ROOT/$PATH_TO_ARCHIVE