[BACKEND] Minor fixes found when building triton with LLVM 17/main branches (#2089)

- These minor fixes are not specific to interface changes from LLVM main
or official llvm-17 branch and can be applied on triton main branch.
- https://github.com/darkbuck/triton/tree/darkbuck/main/llvm-main-branch
has extra changes to build again LLVM main branch build to enable me to
work on other backends on the main branch only. That's the hobby effort
and just FYR.

python/setup.py

@@ -335,6 +335,7 @@ setup(
             "matplotlib",
             "pandas",
             "tabulate",
+            "torch",
         ],
     },
 )