Add support for Habana accelerator (HPU)

[jerome-habana]

What does this PR do?

• A new accelerator to support Gaudi devices added
• DDP support for habana multi-card runs enabled
• HPU precision plugin for bf16 added
• HPU checkpoint io plugin added
• Distributed overrides updated for HPU tensor types support
• Accelerator tests with an example model added

Fixes #10214

Does your PR introduce any breaking changes? If yes, please list them.

None

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Make sure you had fun coding 🙃

don't like the special script a lot, but blocking the integration