NFC: Break up the mlir python bindings into individual sources.

* IRModules.cpp -> (IRCore.cpp, IRAffine.cpp, IRAttributes.cpp, IRTypes.cpp).
* The individual pieces now compile in the 5-15s range whereas IRModules.cpp was starting to approach a minute (didn't capture a before time).
* More fine grained splitting is possible, but this represents the most obvious.

Differential Revision: https://reviews.llvm.org/D98978

Author: stellaraccident

mlir/lib/Bindings/Python/CMakeLists.txt

@@ -70,7 +70,10 @@ add_mlir_python_extension(MLIRCoreBindingsPythonExtension _mlir
     python
   SOURCES
     MainModule.cpp
-    IRModules.cpp
+    IRAffine.cpp
+    IRAttributes.cpp
+    IRCore.cpp
+    IRTypes.cpp
     PybindUtils.cpp
     Pass.cpp
     ExecutionEngine.cpp

mlir/lib/Bindings/Python/ExecutionEngine.cpp

@@ -8,7 +8,7 @@
 
 #include "ExecutionEngine.h"
 
-#include "IRModules.h"
+#include "IRModule.h"
 #include "mlir-c/Bindings/Python/Interop.h"
 #include "mlir-c/ExecutionEngine.h"