ServerSideExpressions: Disable SQL Expressions to prevent RCE and LFI vulnerability (#94942)

* disable sql expressions

remove duckdb ref

* Run `make update-workspace`

---------

Co-authored-by: Scott Lepper <scott.lepper@gmail.com>

pkg/expr/reader.go

@@ -126,6 +126,10 @@ func (h *ExpressionQueryReader) ReadQuery(
 		}
 
 	case QueryTypeSQL:
+		enabled := enableSqlExpressions(h)
+		if !enabled {
+			return eq, fmt.Errorf("sqlExpressions is not implemented")
+		}
 		q := &SQLExpression{}
 		err = iter.ReadVal(q)
 		if err == nil {
@@ -186,3 +190,11 @@ func getReferenceVar(exp string, refId string) (string, error) {
 	}
 	return exp, nil
 }
+
+func enableSqlExpressions(h *ExpressionQueryReader) bool {
+	enabled := !h.features.IsEnabledGlobally(featuremgmt.FlagSqlExpressions)
+	if enabled {
+		return false
+	}
+	return false
+}