[Snippets][DEBUG_CAPS] Add final Linear IR dump capability with subgraph naming (#32026)
### Details:
Add support for dumping final Linear IR right before code generation
using the existing OV_SNIPPETS_DUMP_LIR debug capability.
- Extend `OV_SNIPPETS_DUMP_LIR` to support "final" pass name for
capturing the final state of Linear IR before code generation
- Add `name_modifier` option to include subgraph friendly names in dump
filenames
- Sanitize subgraph names by replacing '/' and ':' with '_'
- Update `LIRPassDump` to support optional name prefix for better file
identification when multiple subgraphs are present
Usage:
```bash
OV_SNIPPETS_DUMP_LIR="passes=final name_modifier=subgraph_name" binary
```
### Tickets:
- N/A