[Snippets][CPU] Precision enforcement fix (#32914)
### Details:
- *Fixed precision enforcement issue via workaround for precision
enforcement pipeline: do not enforce precisions if precision enforcement
breaks transpose fusion. Although this leads to non-optimal performance,
such cases (Subgraph input precisions are f32, but bf16 is forced
internally) don't occur in real scenarios.*
- *The changes were validated on large model scope to confirm that there
are no perf degradations on real models*
- *Tests are extended to cover the fixed scenario (f32 in/out precision
and bf16 inference precision)*
### Tickets:
- *CVS-176621*
