[ci] Remove shared key for cache and add cache for migrations (polkadot-fellows#142)

PR removes shared key for rust-cache action. When 2 different workflows
use the same shared-key they try to use the same destination for cache
which makes it unusable for them (they have race condition who will be
the first to write there). Also PR adds cache for migration jobs and
cancelling jobs on previous runs.

cc polkadot-fellows#134

---------

Co-authored-by: fellowship-merge-bot[bot] <151052383+fellowship-merge-bot[bot]@users.noreply.github.com>

Author: alvicsam

.github/workflows/check-migrations.yml

@@ -13,6 +13,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
+# drop permissions for default token
+permissions: {}
+
 jobs:
   runtime-matrix:
     runs-on: ubuntu-latest
@@ -51,13 +54,19 @@ jobs:
           chmod +x ./try-runtime
 
       - name: Install Protoc
-        uses: arduino/setup-protoc@v1
+        uses: arduino/setup-protoc@149f6c87b92550901b26acd1632e11c3662e381f # v1.3.0
         with:
           version: "3.6.1"
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Add wasm32-unknown-unknown target
         run: rustup target add wasm32-unknown-unknown
 
+      - name: Fetch cache
+        uses: Swatinem/rust-cache@a95ba195448af2da9b00fb742d14ffaaf3c21f43 # v2.7.0
+        with:
+          shared-key: "fellowship-cache-migrations"
+
       - name: Build ${{ matrix.runtime.name }}
         run: |
           cargo build --profile production -p ${{ matrix.runtime.package }} --features try-runtime -q --locked

.github/workflows/clippy.yml

@@ -2,11 +2,16 @@ name: "Clippy"
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
   workflow_dispatch:
 
+# cancel previous runs
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   clippy:
     runs-on: ubuntu-22.04
@@ -28,7 +33,7 @@ jobs:
       - name: Fetch cache
         uses: Swatinem/rust-cache@a95ba195448af2da9b00fb742d14ffaaf3c21f43 # v2.7.0
         with:
-          shared-key: "fellowship-cache"
+          shared-key: "fellowship-cache-clippy"
 
       - name: Clippy
         run: cargo +nightly clippy --all-targets --locked -q

.github/workflows/test.yml

@@ -2,11 +2,16 @@ name: "Test all features"
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
   pull_request:
-    branches: [ "main" ]
+    branches: ["main"]
   workflow_dispatch:
 
+# cancel previous runs
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-22.04
@@ -51,7 +56,7 @@ jobs:
       - name: Fetch cache
         uses: Swatinem/rust-cache@a95ba195448af2da9b00fb742d14ffaaf3c21f43 # v2.7.0
         with:
-          shared-key: "fellowship-cache"
+          shared-key: "fellowship-cache-tests"
 
       - name: Test
         run: cargo test --workspace --release --locked -q --features=runtime-metrics,try-runtime