Add tracing for AzureOpenAI client

[bignoncedric]

Problem Statement

Currently OpenAI integration works only for vanilla open AI client OpenAI class in openai module.
The Azure OpenAI version is not instrumented despite being included in the openai module and exposing the same interface.

Solution Brainstorm

Slightly refactoring the packages/node/src/integrations/tracing/openai/instrumentation.ts to be able to patch the two clients may work:

  private _patch(exports: PatchedModuleExports): PatchedModuleExports | void {
    let result = exports;
    result = this._patchClient(result, 'OpenAI');
    result = this._patchClient(result, 'AzureOpenAI');
    return result;
  }

Additional Context

No response

Priority

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[linear]

JS-1191

[Lms24]

Closing as #18281 was merged. Thanks!

(The change will be included in the next releas).