ci: fix validation and test workflows

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           go-version: 1.20
       - name: Install dependencies
-        run: go mod tidy
+        run: go mod download
       - name: Run local-setup
         run: |
           git clone https://github.com/matter-labs/local-setup.git

.github/workflows/validate.yml

@@ -22,16 +22,16 @@ jobs:
           go-version: 1.20
       - name: Run gofmt
         run: |
-          echo "Checking code formatting..."
-          gofmt -d -e .
-      - name: Run golangci-lint
-        run: |
-          echo "Running linter..."
-          go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
-          golangci-lint run ./...
-      - name: Fail if issues found
-        run: exit 1
-        if: ${{ failure() || success() }}
+          fmt_output=$(gofmt -l .)
+
+          if [ -n "$fmt_output" ]; then
+            echo "Code not formatted correctly:"
+            echo "$fmt_output"
+            exit 1
+          else
+            echo "Code is formatted correctly"
+            exit 0
+          fi
   commits:
     name: Check commits
     runs-on: ubuntu-latest