Update base for Update on "[executorch] Remove EXECUTORCH_CLIENTS visibility gating - Other Backends"

Remove the EXECUTORCH_CLIENTS buck client list visibility gating from additional
backend targets. This replaces all visibility blocks containing EXECUTORCH_CLIENTS
with explicit PUBLIC visibility.

This is part 5 of a multi-diff stack to remove visibility gating across all of executorch.
This diff covers:
- backends/aoti
- backends/apple (coreml, mps)
- backends/arm
- backends/cadence
- backends/cortex_m
- backends/cuda
- backends/nxp
- backends/qualcomm
- backends/test
- backends/transforms

Differential Revision: [D89902029](https://our.internmc.facebook.com/intern/diff/D89902029/)

[ghstack-poisoned]

Author: GregoryComer