Update openai overview and metadata for web integration (#15350)

* Update overview and metadata for web integration

* Remove newline

* Add API prefix

* Update metadata

* Update metadata

* Update openai/README.md

Co-authored-by: Ursula Chen <58821586+urseberry@users.noreply.github.com>

* Add api usage overview dashboard

* Update openai/manifest.json

Co-authored-by: Florent Clarret <florent.clarret@datadoghq.com>

---------

Co-authored-by: Ursula Chen <58821586+urseberry@users.noreply.github.com>
Co-authored-by: Florent Clarret <florent.clarret@datadoghq.com>

openai/README.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-Get cost estimation, prompt and completion sampling, error tracking, performance metrics, and more out of [OpenAI][1] Python and Node.js library requests using Datadog metrics, APM, and logs.
+Get cost estimation, prompt and completion sampling, error tracking, performance metrics, and more out of [OpenAI][1] account-level, Python, and Node.js library requests using Datadog metrics, APM, and logs.
 
 ## Setup
 
@@ -12,6 +12,10 @@ Get cost estimation, prompt and completion sampling, error tracking, performance
 
 ### Installation
 
+<!-- NOTE: This section is overwritten by the OpenAI configuration component exported in -->
+<!-- web-ui. Make sure to update the markdown / code there to see any changes take -->
+<!-- effect on the tile. -->
+
 1. Enable APM and StatsD in your Datadog Agent. For example, in Docker:
 
 ```shell