RpcPublisher: stop suppressing TimeoutError

[mackenzie-grimes-noaa]

Linear Issue

IDSSE-1243

Changes

• RpcPublisher.send_request(): allow the TimeoutError to be raised and handled by the caller as it wishes.
  • Previously a WARNING level log was always printed and None was returned. This assumes we know how the caller wants timeouts to be handled.
  • Example: the DAS data_preload service intentionally times out because it doesn't care about the responses. Because of previous RpcPublisher code, WARNING logs were constantly printed to the console even when the service was performing nominally.

Note: this is a breaking change! Risk Processor and DAS data_preload currently expect send_request() to catch TimeoutErrors for them, and this PR would cause uncaught errors unless their code changes first.

Explanation

N/A