Switch to use diener patch for companion build (paritytech#8073)

This switch to the new `diener patch` command to patch all Substrate
crates in Polkadot. This should remove the requirement to manually merge
Substrate master to make the companion build, as we now would use the
already with master merged code from this build job local checkout.

.maintain/gitlab/check_polkadot_companion_build.sh

@@ -51,6 +51,8 @@ git merge origin/master
 # ancestor for successfully performing merges below.
 git clone --depth 20 https://github.com/paritytech/polkadot.git
 
+cargo install -f diener
+
 cd polkadot
 
 # either it's a pull request then check for a companion otherwise use
@@ -85,9 +87,8 @@ else
   boldprint "this is not a pull request - building polkadot:master"
 fi
 
-cd ..
-diener --substrate --branch $CI_COMMIT_REF_NAME --git https://gitlab.parity.io/parity/substrate.git --path polkadot
-cd polkadot
+# Patch all Substrate crates in Polkadot
+diener patch --crates-to-patch ../ --substrate
 
 # Test Polkadot pr or master branch with this Substrate commit.
 cargo update -p sp-io