after() callback and request API fix in actions/handlers

Misc Changes

• Upgrade to swc 70: #94814
• [turbopack] Sort modules in chunks to reduce duplicates: #94961
• router instrumentation: refactor client hook dispatch (1/7): #94755
• [otel] Add more verbose-mode OTEL spans for App Router: #94894
• Enforce route segment configs on metadata routes under Cache Components: #94962
• typegen: default to Turbopack: #94952
• router instrumentation: add transition start context (2/7): #94766
• fix: after(callback) called after response end: #94974
• fix: request APIs in promises passed to after() in actions/handlers: #94964

Credits

Huge thanks to @mischnic, @sampoder, @feedthejim, @unstubbable, @wbinnssmith, and @lubieowoce for helping!