[bug report] Double incrementing te_request_count metric in successful single openai_embed requests

[aarongreen-datadog]

As mentioned in the title, I believe this line is a bug and should actually be te_request_success. We're setting up observability for TEI, and we use the openai-compatible /v1/embeddings endpoint, and I noticed weird numbers coming from the metrics, which led me to finding this line as the likely culprit.

I think the same bug might exist in the following functions in the HTTP and grpc APIs:
HTTP

• here (originally linked location above)
• here
• here
• here

GRPC

• here
• here
• here