[Triton-MLIR][Testing]Fix tests warning, with small code clean-up (#894)

1.Code clean-up to remove superfluous #includes.
2.Fix two python test warnings, in which one relates to ["#"
formats](https://jira.mongodb.org/browse/PYTHON-2343), the other relates
to regular expression string usage.

include/triton/Target/LLVMIR/LLVMIRTranslation.h

@@ -2,6 +2,7 @@
 #define TRITON_TARGET_LLVMIRTRANSLATION_H
 #include "llvm/ADT/StringRef.h"
 #include <memory>
+#include <string>
 #include <vector>
 
 namespace llvm {

include/triton/Target/PTX/PTXTranslation.h

@@ -1,7 +1,6 @@
 #ifndef TRITON_TARGET_PTXTRANSLATION_H
 #define TRITON_TARGET_PTXTRANSLATION_H
 
-#include <memory>
 #include <string>
 
 namespace llvm {

lib/Target/LLVMIR/LLVMIRTranslation.cpp

@@ -3,11 +3,9 @@
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
 #include "mlir/ExecutionEngine/ExecutionEngine.h"
 #include "mlir/ExecutionEngine/OptUtils.h"
-#include "mlir/IR/BuiltinOps.h"
 #include "mlir/IR/Dialect.h"
 #include "mlir/Pass/Pass.h"
 #include "mlir/Pass/PassManager.h"
-#include "mlir/Support/LogicalResult.h"
 #include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"
 #include "mlir/Target/LLVMIR/Dialect/NVVM/NVVMToLLVMIRTranslation.h"
 #include "mlir/Target/LLVMIR/Export.h"

lib/Target/PTX/PTXTranslation.cpp

@@ -1,46 +1,17 @@
 #include "triton/Target/PTX/PTXTranslation.h"
-#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
-#include "mlir/ExecutionEngine/ExecutionEngine.h"
-#include "mlir/ExecutionEngine/OptUtils.h"
-#include "mlir/IR/BuiltinOps.h"
-#include "mlir/IR/Dialect.h"
-#include "mlir/Pass/Pass.h"
-#include "mlir/Pass/PassManager.h"
-#include "mlir/Support/LogicalResult.h"
-#include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"
-#include "mlir/Target/LLVMIR/Export.h"
-#include "mlir/Target/LLVMIR/LLVMTranslationInterface.h"
 #include "triton/Target/LLVMIR/LLVMIRTranslation.h"
 
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/ExecutionEngine/SectionMemoryManager.h"
 #include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Verifier.h"
 #include "llvm/MC/TargetRegistry.h"
-#include "llvm/Support/CodeGen.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Transforms/Scalar.h"
-#include "llvm/Transforms/Utils/Cloning.h"
 #include <filesystem>
-#include <regex>
 
 namespace triton {
 
-extern "C" {
-int set_curterm(char *nterm) { return 0; }
-int del_curterm(char *nterm) { return 0; }
-int tigetnum(char *capname) { return 0; }
-int setupterm(char *term, int fildes, int *errret) { return 0; }
-}
-
 static void init_llvm() {
   LLVMInitializeNVPTXTargetInfo();
   LLVMInitializeNVPTXTarget();

python/triton/compiler.py

@@ -1319,7 +1319,7 @@ def make_stub(name, signature, constants):
 
 
 def convert_type_repr(x):
-    match = re.search('!tt\.ptr<(.*)>', x)
+    match = re.search(r'!tt\.ptr<(.*)>', x)
     if match is not None:
       return '*' + convert_type_repr(match.group(1))
     return x
@@ -1490,6 +1490,7 @@ class CudaUtils(object):
         #include <cuda.h>
 
         #include \"cuda.h\"
+        #define PY_SSIZE_T_CLEAN 
         #include <Python.h>
 
         static inline void gpuAssert(CUresult code, const char *file, int line)