[mlir] Add LinalgInterface method to clone with a given BlockAndValueMapping.

[mravishankar]

Summary

Since Linalg operations have regions by default which are not isolated
from above, add an another method to the interface that will take a
BlockAndValueMapping to remap the values within the region as well.

[mravishankar]

Edit comment

mlir/include/mlir/Dialect/Linalg/IR/LinalgInterfaces.td

InterfaceMethod<
         OperationState state(
           loc, ConcreteOp::getOperationName(), operands, resultTypes,
           $_op->getAttrs());
         for (Region &r : $_op->getRegions())
           r.cloneInto(state.addRegion(), bvm);
         return b.createOperation(state);
       }]
     >,
+    InterfaceMethod<
+      /*desc=*/[{
+        Clone the current operation with the given location, operands
+        and BlockAndValueMapping. This is used to abstract away the
+        optional underlying region creation. This does not change the
+        balance between input, output_buffer and init_tensors
+        operands.
+      }],
+      /*retTy=*/"Operation *",
+      /*methodName=*/"cloneWithMapper",
+      (ins "OpBuilder &":$b, "Location":$loc, "TypeRange":$resultTypes,
+           "ValueRange":$operands, "BlockAndValueMapping &":$bvm),
+      [{
+        OperationState state(
+          loc, ConcreteOp::getOperationName(), operands, resultTypes,
+          $_op->getAttrs());
+        for (Region &r : $_op->getRegions())
+          r.cloneInto(state.addRegion(), bvm);
+        return b.createOperation(state);
+      }]
+    >,
     StaticInterfaceMethod<
       /*desc=*/[{
         Returns the region builder for constructing the body for linalg.generic.
         Returns a null function if this named op does not define a region
         builder.
       }],
       /*retTy=*/"std::function<void(Block &, ValueRange)>",
       /*methodName=*/"getRegionBuilder",