Install Go in prepare-test action

Author: mbg

.github/actions/prepare-test/action.yml

@@ -12,6 +12,10 @@ inputs:
     description: "If true, we setup kotlin"
     default: 'true'
     required: true
+  setup-go:
+    description: "If true, we setup go"
+    default: 'true'
+    required: true
 outputs:
   tools-url:
     description: "The value that should be passed as the 'tools' input of the 'init' step."
@@ -80,3 +84,8 @@ runs:
       if: ${{ inputs.setup-kotlin == 'true' }}
       with:
         version: 1.8.21
+
+    - uses: actions/setup-go@v5
+      if: ${{ inputs.setup-go == 'true' }}
+      with:
+        go-version: ">=1.21.0"