Closes #58305

OpenAI sunset GPT-5.2 and GPT-5.3-Codex in Codex for ChatGPT account
logins on June 2nd, so sending to them via the ChatGPT Subscription
provider now fails with error. This PR removes those models from ChatGPT
Subscription model list.

Release Notes:

- Removed the retired GPT-5.2 and GPT-5.3 Codex models from the ChatGPT
Subscription provider.