Arm backend: Improve permute/view fusing (#21055)

- Makes view/permutes always split to all branches of a node with
multiple outputs for downward propagation. Note that this will never
increase the number of permutes/views in the graph, since any non-fused
permutes/views will propagate back and be fused together again by the
upward propagation pass.

- Adds support for where operator to fuse_identical_input_transforms

- Replaces _would_strand_layout_op_on_wider_elements with
MoveDataMovementOpsToSmallerDtypePass to allow ops to
 propagate more freely during the fusing phase

- Adds tosa ops to MatchArgsPass since it is run after some ops have
been rewritten to TOSA.

- Generalizes refresh_permute_view_meta into refresh_node_meta which
works for any operators and uses that.


Signed-off-by: Adrian Lundell <adrian.lundell@arm.com>