Skip evaluations for tool calls llm invocations and errored invocations

[wrisa]

1. Assigns correct finish reason when tool call for llm invocation
2. Skips evaluation when tool call for llm invocation when offer.
3. Skips evaluation for error invocation. Adds error type on invocation object and verifies at the time of offer.

See below for 1) and 2)
skips eval for tool call chat span


shows evals for normal chat span

See below for 3)