[Cherry-pick] Change: uint -> size_t to make RewriteTensorPointer.cpp crossplatform (#8048) (#567)

Summary:
Cherry-picked from upstream OAI repository.

Original Commit: 8af2b7b
Original Author: Anatoly Myachev
Original Date: 2025-09-03 15:52:27 +0200

Original commit message:
```
Change: `uint -> size_t` to make `RewriteTensorPointer.cpp` crossplatform (#8048)

Signed-off-by: Anatoly Myachev <anatoly.myachev@intel.com>
```

This PR was automatically cherry-picked from the upstream triton-lang/triton repository.

Pull Request resolved: #567

Reviewed By: dshi7

Differential Revision: D85985262

Pulled By: agron911

fbshipit-source-id: b6d388f5ca910ac815764bdf4c9dce152e8fb03a

Author: agron911

lib/Dialect/Triton/Transforms/RewriteTensorPointer.cpp

@@ -81,7 +81,7 @@ struct RewritedInfo {
     // Expand dimensions
     Value expandedResult =
         builder.create<arith::AddIOp>(loc, splatOffset, i64Range);
-    for (uint j = 0; j < tensorShape.size(); ++j) {
+    for (size_t j = 0; j < tensorShape.size(); ++j) {
       if (j == i)
         continue;
       expandedResult =
@@ -259,7 +259,7 @@ class RewriteTensorPointerPass
     // Calculate new offsets
     assert(info.length() == op.getOffsets().size());
     SmallVector<Value> newOffsets;
-    for (uint i = 0; i < info.length(); ++i) {
+    for (size_t i = 0; i < info.length(); ++i) {
       Value i64Offset = builder.create<arith::ExtSIOp>(
           op.getLoc(), builder.getI64Type(), op.getOffsets()[i]);
       Value newOffset = builder.create<arith::AddIOp>(