Remove wildcard imports (#5018)

<!--
Please read the "Making a PR" section of
[`CONTRIBUTING.md`](https://github.com/emilk/egui/blob/master/CONTRIBUTING.md)
before opening a Pull Request!

* Keep your PR:s small and focused.
* The PR title is what ends up in the changelog, so make it descriptive!
* If applicable, add a screenshot or gif.
* If it is a non-trivial addition, consider adding a demo for it to
`egui_demo_lib`, or a new example.
* Do NOT open PR:s from your `master` branch, as that makes it hard for
maintainers to test and add commits to your PR.
* Remember to run `cargo fmt` and `cargo clippy`.
* Open the PR as a draft until you have self-reviewed it and run
`./scripts/check.sh`.
* When you have addressed a PR comment, mark it as resolved.

Please be patient! I will review your PR, but my time is limited!
-->

I removed (I hope so) all wildcard imports I found.

For me on my pc this improved the build time:
- for egui -5s
- for eframe -12s

* [x] I have followed the instructions in the PR template

crates/eframe/src/native/wgpu_integration.rs

@@ -1,4 +1,4 @@
-//! Note that this file contains code very similar to [`glow_integration`].
+//! Note that this file contains code very similar to [`super::glow_integration`].
 //! When making changes to one you often also want to apply it to the other.
 //!
 //! This is also very complex code, and not very pretty.
@@ -29,7 +29,7 @@ use crate::{
     App, AppCreator, CreationContext, NativeOptions, Result, Storage,
 };
 
-use super::{winit_integration::WinitApp, *};
+use super::{epi_integration, event_loop_context, winit_integration, winit_integration::WinitApp};
 
 // ----------------------------------------------------------------------------
 // Types: