Link component leads to unnecessary re-renders with legacyBehavior

### Link to the code that reproduces this issue https://codesandbox.io/p/devbox/hardcore-neumann-dw8484 ### To Reproduce Click the "Update Time" button, which updates a query parameter in the URL to the current time. Observe that the component "MyButton" re-renders due to the "Link" wrapper after a query param changed, despite its render being totally independent to changing query parameters and using React.memo ### Current vs. Expected behavior Current behavior is that the Link component uses `useRouter()` causing it to re-render when any query parameters change. This causes it to pass a new instance of the 'onClick', 'onMouseEnter', and 'onTouchStart' props to the child, which forces it to rerender. Expected behavior is that the Link component should not need to re-render at all in this case, and even if it did re-render it should pass a stable function for onClick/onMouseEnter/onTouchStart to prevent the button from re-rendering (since only query params have changed, nothing related to the button's navigation has changed). This causes many unnecessary re-renders across a website when navigations happen, in particular for components which remain mounted such as a header/left-rail or when only query parameters are changing (which doesn't impact most of the page typically). ### Provide environment information ```bash Operating System: Platform: linux Arch: x64 Version: #1 SMP PREEMPT_DYNAMIC Sun Aug 6 20:05:33 UTC 2023 Available memory (MB): 4102 Available CPU cores: 2 Binaries: Node: 20.9.0 npm: 9.8.1 Yarn: 1.22.19 pnpm: 8.10.2 Relevant Packages: next: 15.0.0-canary.104 // Latest available version is detected (15.0.0-canary.104). eslint-config-next: N/A react: 19.0.0-rc-06d0b89e-20240801 react-dom: 19.0.0-rc-06d0b89e-20240801 typescript: 5.3.3 Next.js Config: output: N/A ``` ### Which area(s) are affected? (Select all that apply) Navigation, Performance, Runtime ### Which stage(s) are affected? (Select all that apply) next dev (local)…