main-tests.yml: setup-go added to build part, Go cache removed

Author: miha-stopar

.github/workflows/main-tests.yml

@@ -135,16 +135,10 @@ jobs:
           override: false
       - name: Add target
         run: rustup target add x86_64-unknown-linux-gnu
-      # Go cache for building geth-utils
-      - name: Go cache
-        uses: actions/cache@v3
+      - name: Setup golang
+        uses: actions/setup-go@v4
         with:
-          path: |
-            ~/.cache/go-build
-            ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
+          go-version: ~1.21
       - name: Cargo cache
         uses: actions/cache@v3
         with: