Adds method to AffineApplyOp which forward substitutes its results into any of...

Adds method to AffineApplyOp which forward substitutes its results into any of its users which are also AffineApplyOps.
Updates ComposeAffineMaps test pass to use this method.
Updates affine map composition test cases to handle the new pass, which can be reused when this method is used in a future instruction combine pass.

PiperOrigin-RevId: 217163351