[NFC] Simplify the tiling implementation using cloning. (llvm#72178)

The current implementation of tiling using `scf.for` is convoluted to
make sure that the destination passing style of the untiled program is
preserved. The addition of support to tile using `scf.forall` (adapted
from the transform operation in Linalg) in
llvm#67083 used cloning of the
tiled operations to better streamline the implementation. This PR adapts
the other tiling methods to use a similar approach, making the
transformations (and handling destination passing style semantics) more
systematic.

---------

Co-authored-by: Abhishek-Varma <[email protected]>

mlir/include/mlir/Dialect/SCF/Transforms/TileUsingInterface.h

@@ -83,6 +83,12 @@ FailureOr<SCFTilingResult> tileUsingSCFForOp(RewriterBase &rewriter,
                                              TilingInterface op,
                                              const SCFTilingOptions &options);
 
+/// Method to tile an op that implements the `TilingInterface` using
+/// `scf.forall`.
+FailureOr<SCFTilingResult>
+tileUsingSCFForallOp(RewriterBase &rewriter, TilingInterface op,
+                     const SCFTilingOptions &options);
+
 /// Options used to control tile + fuse.
 struct SCFTileAndFuseOptions {
   /// The tiling options used to control the tiling of the consumer.
@@ -93,12 +99,6 @@ struct SCFTileAndFuseOptions {
   }
 };
 
-/// Method to tile an op that implements the `TilingInterface` using
-/// `scf.forall`.
-FailureOr<SCFTilingResult>
-tileUsingSCFForallOp(RewriterBase &rewriter, TilingInterface op,
-                     const SCFTilingOptions &options);
-
 /// Fuse the producer of the source of `candidateSliceOp` by computing the
 /// required slice of the producer in-place.  Note that the method
 /// replaces the uses of `candidateSliceOp` with the tiled and fused producer