feat(nextjs): Remove tracing from middleware wrappers

[logaretm]

closes #18308

For Next 13, it doesn't create transactions for middlewares, so we cannot patch this AFAIK without including traces in the middleware. Maybe a conversation for v11

[linear[bot]]

JS-1208 Remove tracing from Middleware wrapper template

[github-actions[bot]]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,811	-	8,432	+4%
GET With Sentry	1,765	20%	1,645	+7%
GET With Sentry (error only)	6,081	69%	5,458	+11%
POST Baseline	1,210	-	1,169	+4%
POST With Sentry	602	50%	550	+9%
POST With Sentry (error only)	1,080	89%	1,016	+6%
MYSQL Baseline	3,338	-	3,241	+3%
MYSQL With Sentry	480	14%	368	+30%
MYSQL With Sentry (error only)	2,748	82%	2,593	+6%

View base workflow run