Ensure we support all sorts of model names of OAI in the cost modeller

[pascalwhoop]

+---------------------------+
|model                      |
+---------------------------+
|gpt-3.5-turbo-0613         |
|text-davinci-003           |
|text-embedding-ada-002-v2  |
|gpt-3.5-turbo-0301         |
|gpt-4-0613                 |
|davinci                    |
|gpt-4-0314                 |
|text-curie-001             |
|text-babbage-001           |
|text-davinci-002           |
|text-search-ada:001        |
|text-ada-001               |
|text-embedding-ada-002     |
|ada                        |
|text-similarity-davinci:001|
+---------------------------+

Note all the model names from V1 above. We should support them all on the billing config