Add MTIA and META to triple (#150236)
Ref:
https://ai.meta.com/blog/next-generation-meta-training-inference-accelerator-AI-MTIA/
This PR contains
1. MTIA: Meta Training and Inference Accelerator as Environment.
2. Meta as the vendor.
### Testing
Added a unittest for the relevant changes
### Reviewers
@clayborg , @jeffreytan81 , @Jlalond
