CI: Run substrate-contracts-node in GHA (#1425)

* Run `substrate-contracts-node` for GHA

* Revert me: Run on PR

* Fix file mode

* Fix path to binary

* Distinguish between Mac and Windows

* Fix config syntax

* Revert "Revert me: Run on PR"

This reverts commit ee2515d.

Author: cmichi

.github/workflows/examples.yml

@@ -67,6 +67,20 @@ jobs:
           crate: dylint-link
           version: 1
 
+      - name: Download and run latest `substrate-contracts-node` binary
+        if: runner.os == 'macOS'
+        run: |
+            curl -L -o substrate-contracts-node.zip 'https://gitlab.parity.io/parity/mirrors/substrate-contracts-node/-/jobs/artifacts/main/download?job=build-mac' && \
+            unzip substrate-contracts-node.zip && \
+            chmod +x artifacts/substrate-contracts-node-mac/substrate-contracts-node &&
+            ./artifacts/substrate-contracts-node-mac/substrate-contracts-node -linfo,runtime::contracts=debug  2>&1 | tee /tmp/contracts-node.log &
+
+      - name: Install and run latest `substrate-contracts-node` binary
+        if: runner.os == 'Windows'
+        run: |
+            cargo install contracts-node --git https://github.com/paritytech/substrate-contracts-node.git --force --locked && \
+            substrate-contracts-node -linfo,runtime::contracts=debug  2>&1 | tee /tmp/contracts-node.log &
+
       - name: Rust Cache
         uses: Swatinem/[email protected]