Improve clippy CI performance (paritytech#239)

* Specify --release when running clippy in CI

* Move code checks into build job

.github/workflows/release.yml

@@ -100,36 +100,6 @@ jobs:
       - name: Check with Prettier
         run: npx prettier --check --ignore-path .gitignore  '**/*.(yml|js|ts|json)'
 
-  check-clippy:
-    name: "Code checks"
-    runs-on: self-hosted
-    steps:
-      - name: Checkout
-        if: github.event_name == 'pull_request_target'
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-          ref: refs/pull/${{ github.event.pull_request.number }}/merge
-
-      - name: Checkout
-        if: github.event_name != 'pull_request_target'
-        uses: actions/checkout@v2
-
-      - name: Install toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2020-10-03
-          components: clippy, rustfmt
-          target: wasm32-unknown-unknown
-          default: true
-
-      - name: Check with Clippy
-        run: cargo clippy --workspace
-
-      - name: Format code with rustfmt
-        run: cargo fmt -- --check
-
   ####### Building and Testing binaries #######
 
   build:
@@ -209,6 +179,10 @@ jobs:
         with:
           name: moonbeam
           path: build
+      - name: Check with Clippy
+        run: cargo clippy --release --workspace
+      - name: Format code with rustfmt
+        run: cargo fmt -- --check
 
   ####### Prepare and Deploy Docker images #######