Fix FST_LIGHTMYREQUEST_DEP01 warnings. #2599
Description
When running tests, there are 3 warnings to be movbed to req.socket instead.
test/async-await.test.js 2> (node:53510) [FST_LIGHTMYREQUEST_DEP01] FastifyDeprecationLightMyRequest: You are accessing "request.connection", use "request.socket" instead.
test/404s.test.js 2> (node:53508) [FST_LIGHTMYREQUEST_DEP01] FastifyDeprecationLightMyRequest: You are accessing "request.connection", use "request.socket" instead.
test/logger.test.js 2> (node:53552) [FST_LIGHTMYREQUEST_DEP01] FastifyDeprecationLightMyRequest: You are accessing "request.connection", use "request.socket" instead.