INF-1307 enforce gofmt -s in lint.sh

gofmt without -s misses simplifications (range over int, redundant
slice expressions, type elision in composite literals). Add the flag so
the lint job catches them going forward. No code change needed - tree
was already clean under -s.

Author: brtkwr

scripts/lint.sh

@@ -10,10 +10,10 @@ cd "${ROOT}"
 # scratch directory.
 mapfile -t GO_FILES < <(find . -name "*.go" -not -name "zz_generated.go" -not -path "./.build/*")
 
-echo "==> gofmt"
-unformatted="$(gofmt -l "${GO_FILES[@]}" || true)"
+echo "==> gofmt -s"
+unformatted="$(gofmt -s -l "${GO_FILES[@]}" || true)"
 if [[ -n "${unformatted}" ]]; then
-  echo "gofmt needs to run on:"
+  echo "gofmt -s needs to run on:"
   echo "${unformatted}"
   exit 1
 fi