Create error traces on failures of both embedding and chat creation

[bizob2828]

Errors occurring during chat and embedding creation must be recorded. Along with the standard error properties, we will include additional attributes as custom attributes to the agent.errors.add call.

Attribute	LlmError
http.statusCode	set from response.statusTBD on how to get this
error.message	set from response.error.message
error.code	set from response.code
error.param	set from response.param
completion_id	id of chat completion creation, does not exist for embedding errors
embedding_id	id of embedding. does not exist for chat completion errors.

Note: We should still be recording the relevant LlmEmbedding, LlmChatCompletionMessage, LlmChatCompletionSummary on error although they may lack the same amount of detail as a successful creation. The only addition is an error: true property to the events

[workato-integration]

https://new-relic.atlassian.net/browse/NR-177750