IR serialization

IR could be serialized at specified stages using environment variable OV_CPU_DUMP_IR:

    OV_CPU_DUMP_IR=<space_separated_options> binary ...

Examples:

    OV_CPU_DUMP_IR="transformations" binary ...
    OV_CPU_DUMP_IR="transformations=snippets dir=path/dumpDir" binary ...
    OV_CPU_DUMP_IR="transformations=all,-common dir=path/dumpdir formats=svg,xml" binary ...

Option names are case insensitive, the following options are supported:

• dir=<path>
  Path to dumped IR files. If omitted, it defaults to intel_cpu_dump
• formats=<comma_separated_tokens>
  Filter with IR formats to dump. If omitted, it defaults to xml
  See IR format filter for more details.
• transformations=<comma_separated_tokens>
  Filter with main transformation stages to serialize graph before and after specified ones.
  See transformation filter for more details.

Options are processed from left to right, so last one overwrites previous ones if duplicated.