fix: Fix build failure (#11997)

Summary:
Although `idx_t (aka uint64_t)` and `size_t` have the same underlying representation, they
are still considered different types in the C++ type system.

Pull Request resolved: #11997

Reviewed By: kevinwilfong

Differential Revision: D67752055

Pulled By: xiaoxmeng

fbshipit-source-id: 6cd56e65b626054af97316767592d347cfe198f0

velox/parse/QueryPlanner.cpp

@@ -552,9 +552,9 @@ PlanNodePtr toVeloxPlan(
 }
 
 namespace {
-std::vector<size_t> columnIndices(std::vector<idx_t> map, int32_t size) {
+std::vector<idx_t> columnIndices(std::vector<idx_t> map, int32_t size) {
   if (size > 0 && map.empty()) {
-    std::vector<size_t> result(size);
+    std::vector<idx_t> result(size);
     std::iota(result.begin(), result.end(), 0);
     return result;
   }