Use live sync for try-runtime-migrations test job

b/c try-runtime snapshots format has changed and the older files are no
longer viable. See
paritytech/substrate#12537

Author: atodorov

.github/workflows/runtime-upgrade.yml

@@ -293,11 +293,7 @@ jobs:
           LC_GITHUB_REPO_ADMIN_TOKEN: ${{ secrets.GH_REPO_ADMIN_TOKEN }}
           LC_RUNNER_EPHEMERAL: false
 
-  test-migrations:
-    env:
-      SNAPSHOT_TIME: 12-19-22
-      SNAPSHOT_DIR: /var/tmp/blockchain-snapshot
-      SNAPSHOT_URL: "https://creditcoinblockchain.blob.core.windows.net/latestblocks/creditcoin-2.0-$GITHUB_BASE_REF-try-runtime-snapshot-$SNAPSHOT_TIME.tar.gz"
+  test-migrations-via-try-runtime:
     # see https://gist.github.com/jonico/a94d03cac7a858e0613926d9f1bc7f2b
     runs-on:
       [self-hosted, "${{ needs.deploy-github-runner.outputs.runner_vm_name }}"]
@@ -327,33 +323,31 @@ jobs:
         run: |
           ./scripts/check-hardware.sh
 
-      - name: Download try-runtime snapshots data for Creditcoin
+      - name: Testnet ENV
+        id: testnet-env
+        if: github.base_ref == 'testnet'
         run: |
-          echo "INFO: SNAPSHOT_URL=${{ env.SNAPSHOT_URL }}"
-          echo "INFO: SNAPSHOT_DIR=${{ env.SNAPSHOT_DIR }}"
-
-          curl --silent ${{ env.SNAPSHOT_URL }} > snapshot.tar.gz
-
-          mkdir ${{ env.SNAPSHOT_DIR }}
-          tar -xzvf ./snapshot.tar.gz -C ${{ env.SNAPSHOT_DIR }}
+          echo "rpc_url=wss://rpc.testnet.creditcoin.network:443/ws" >> "$GITHUB_OUTPUT"
 
-          # standardize file names
-          pushd ${{ env.SNAPSHOT_DIR }}
-          mv creditcoin-*.child creditcoin.child
-          mv creditcoin-*.top   creditcoin.top
-          popd
+      - name: Mainnet ENV
+        id: mainnet-env
+        if: github.base_ref == 'main'
+        run: |
+          echo "rpc_url=wss://rpc.mainnet.creditcoin.network:443/ws" >> "$GITHUB_OUTPUT"
 
       - name: Try-runtime migrations
         run: |
           ./target/release/creditcoin-node try-runtime \
               --runtime ./target/release/creditcoin_node_runtime.compact.compressed.wasm \
-              --dev on-runtime-upgrade snap --snapshot-path ${{ env.SNAPSHOT_DIR }}/creditcoin.
+              --dev on-runtime-upgrade live --uri ${{ env.RPC_URL }}
+        env:
+          RPC_URL: ${{ steps.testnet-env.outputs.rpc_url || steps.mainnet-env.outputs.rpc_url }}
 
   remove-github-runner:
     runs-on: ubuntu-22.04
     needs:
       - deploy-github-runner
-      - test-migrations
+      - test-migrations-via-try-runtime
       - execute-integration-tests
     if: ${{ always() && needs.deploy-github-runner.result != 'skipped' }}