Materialize symbolic dimensions when the Arm high-rank permute and
view/permute canonicalization passes create views. Move the shared
helper to transforms and declare its Buck dependency.

Keep views in place when their shape depends on an FX node or an
unbacked symbol, preventing rewrites from crossing shape producers.
Refresh metadata for canonicalized permutes emitted from custom
target sets.

Add pass tests for dynamic shapes, conservative view ordering, and
the metadata update before retracing.

Change-Id: Ic1f183409fe9bcec2f3189608b1d48971ee94d60
Signed-off-by: Oscar Andersson <oscar.andersson@arm.com>