OpentelemetryReq: log when path_params not set and continue

[derekkraan]

Continuing from a discussion I had on Slack with @bryannaegele.

This pertains to the behaviour present in the OpentelemetryReq library, where the request can be halted under the following circumstances:

• :no_path_params option is unset
• path_params has not been used in the Req.Request

The main issue from my point of view is that the instrumentation is changing application behaviour by halting the request here.

Describe the solution you'd like

• remove the :no_path_params option in favour of the branch no_path_params: true.
• In other words, fall back from path_params HTTP GET /foo/:bar to simply HTTP GET
• Log (Bryan suggested to info, I'd suggest debug) when this fallback occurs.
• Never halt a request.

Describe alternatives you've considered
None

Additional context
None