feat: Update install_go.sh with per-stack Go versions

- cflinuxfs4: Go 1.25.7
- cflinuxfs5: Go 1.25.7
- Remove cflinuxfs3 support (deprecated stack)

Author: ivanovac

scripts/install_go.sh

@@ -5,15 +5,26 @@ set -u
 set -o pipefail
 
 function main() {
-  if [[ "${CF_STACK:-}" != "cflinuxfs3" && "${CF_STACK:-}" != "cflinuxfs4" && "${CF_STACK:-}" != "cflinuxfs5" ]]; then
+  if [[ "${CF_STACK:-}" != "cflinuxfs4" && "${CF_STACK:-}" != "cflinuxfs5" ]]; then
     echo "       **ERROR** Unsupported stack"
     echo "                 See https://docs.cloudfoundry.org/devguide/deploy-apps/stacks.html for more info"
     exit 1
   fi
 
   local version expected_sha dir
-  version="1.25.6"
-  expected_sha="0ed64e3b9cb9b1c2ec57880dae2427b0ee2676f2ae2fb53c2e1bb838c500f9fb"
+
+  # Set Go version and SHA per stack
+  case "${CF_STACK}" in
+    cflinuxfs4)
+      version="1.25.7"
+      expected_sha="12a6e116cffdcd071988cf3c30216a3f08f54d2cfbb45fff67e375823fd0c3b9"
+      ;;
+    cflinuxfs5)
+      version="1.25.7"
+      expected_sha="d48a3dff9477586e625aea33381ddb94d53bcc35ca1f97d471f12477e359d925"
+      ;;
+  esac
+
   dir="/tmp/go${version}"
 
   mkdir -p "${dir}"