Fix go setup in CI (#420)

## Describe the changes

This PR adds the use of setup-go in the CI to ensure that `go` is
installed properly and caches dependencies and build outputs by default

.github/workflows/golang.yml

@@ -25,6 +25,10 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v4
+    - name: Setup go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.20.0'
     - name: Check gofmt
       if: needs.check-changed-files.outputs.golang == 'true'
       run: if [[ $(go list ./... | xargs go fmt) ]]; then echo "Please run go fmt"; exit 1; fi
@@ -39,6 +43,10 @@ jobs:
     steps:
     - name: Checkout Repo
       uses: actions/checkout@v4
+    - name: Setup go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.20.0'
     - name: Build
       working-directory: ./wrappers/golang
       if: needs.check-changed-files.outputs.golang == 'true' || needs.check-changed-files.outputs.cpp_cuda == 'true'
@@ -58,6 +66,10 @@ jobs:
     steps:
     - name: Checkout Repo
       uses: actions/checkout@v4
+    - name: Setup go
+      uses: actions/setup-go@v5
+      with:
+        go-version: '1.20.0'
     - name: Download ICICLE lib artifacts
       uses: actions/download-artifact@v4
       if: needs.check-changed-files.outputs.golang == 'true' || needs.check-changed-files.outputs.cpp_cuda == 'true'
@@ -85,6 +97,10 @@ jobs:
   #   steps:     
   #   - name: Checkout Repo
   #     uses: actions/checkout@v4
+  #   - name: Setup go
+  #     uses: actions/setup-go@v5
+  #     with:
+  #       go-version: '1.20.0'
   #   - name: Download and Install Cuda
   #     if: needs.check-changed-files.outputs.golang == 'true' || needs.check-changed-files.outputs.cpp_cuda == 'true'
   #     id: cuda-toolkit