Tool types not being returned in `langgraph` tool call response

[ericapisani]

Address the failing "Tool Call Agent" AI integration test related to the missing gen_ai.tool.type attribute in a span

[linear-code]

PY-2282

[ericapisani]

After taking a look at this - we're going to remove support for this attribute and remove it from our conventions altogether. We cannot deterministically know what "type" (based on the OTEL conventions for this property) the tool is, and what we have right now is not valuable to users.