Gen AI Embeddings support

[ArthurKnaus]

• Ensure that gen_ai.operation.name is embeddings
• Ensure that span.op is gen_ai.embeddings
• Add the following span attributes:
  • gen_ai.request.model
  • gen_ai.embeddings.input (the input text for the embedding)
  • token attributes

[linear]

JS-1024

[RulaKhaled]

Which AI integration is this for? I already have this issue in backlog JS-796 too