[Bugfix] Add missing field to TritonLanguagePlaceholder (#20812)

Signed-off-by: jiang1.li <jiang1.li@intel.com>

Author: bigPYJ1151

vllm/triton_utils/importing.py

@@ -92,3 +92,4 @@ def __init__(self):
         self.constexpr = None
         self.dtype = None
         self.int64 = None
+        self.int32 = None