[Refactor] Update TVM subproject and streamline buffer store handling (#816)

- Updated the TVM subproject to the latest commit for improved functionality.
- Refactored `warp_specialized_rewriter.cc` to replace placeholder implementations for `BlockNode` and `BlockRealizeNode` with proper role filtering, enhancing code clarity and maintainability.
- Ensured consistent handling of the `cp_async_barrier_noinc` function in `builtin.py` by adding a newline at the end of the file.

tvm @ 87b845fa

-Subproject commit eddefbd65acb7b1ea51dd18068b4049754c4fa7a
+Subproject commit 87b845fa0e14c2029bbf5799fbbbb9d490db4f20

src/transform/warp_specialized_rewriter.cc

@@ -889,14 +889,8 @@ private:
   Stmt VisitStmt_(const BufferStoreNode *op) final { return FilterByRole(op); }
   Stmt VisitStmt_(const LetStmtNode *op) final { return FilterByRole(op); }
   Stmt VisitStmt_(const AssertStmtNode *op) final { return FilterByRole(op); }
-  Stmt VisitStmt_(const BlockNode *op) final {
-    ICHECK(0);
-    return Stmt();
-  }
-  Stmt VisitStmt_(const BlockRealizeNode *op) final {
-    ICHECK(0);
-    return Stmt();
-  }
+  Stmt VisitStmt_(const BlockNode *op) final { return FilterByRole(op); }
+  Stmt VisitStmt_(const BlockRealizeNode *op) final { return FilterByRole(op); }
 
   struct SyncPattern {
     int release_idx, acquire_idx;