huge refactor for high RewritePatterns usage and less ad-hoc cpp code

remove Spatial many ops in favor of tensor ops like in pim

src/PIM/Conversion/ONNXToSpatial/PostPatterns.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "mlir/Dialect/Func/IR/FuncOps.h"
+#include "mlir/IR/MLIRContext.h"
+
+namespace onnx_mlir {
+
+void populateEarlyPostPatterns(mlir::RewritePatternSet& patterns, mlir::MLIRContext* ctx);
+
+void populatePostPatterns(mlir::RewritePatternSet& patterns, mlir::MLIRContext* ctx);
+
+void annotateWeightsConstants(mlir::func::FuncOp funcOp);
+
+} // namespace onnx_mlir