[build][rust] Disable mutable-noalias in rust builds

It was recently discovered that mutable-noalias can lead to
miscompilations (see https://github.com/rust-lang/rust/issues/84958).
This CL disables that optimization for all rust builds.

Bug: 76184
Tests: Manually reviewed basic functionality on devices, relying on CI
for broader coverage

Change-Id: I6555e38c74270cba0d4741b7826ac1705b123010
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/526741
Commit-Queue: Paul Faria <paulfaria@google.com>
Reviewed-by: Adam Perry <adamperry@google.com>
Reviewed-by: Tyler Mandry <tmandry@google.com>
(cherry picked from commit 914bdafb291f4f76e4cafadef5e9c803e8347d3a)