Refactor embedded assets and drop unnecessary dependencies (#34692)

Benefits:

1. smaller binary size (reduces more than 1MB)
2. better control of the assets details
3. fewer unmaintained dependencies
4. faster startup if the assets are not needed
5. won't hang up editors when open "bindata.go" by accident

modules/assetfs/layered.go

@@ -52,8 +52,8 @@ func Local(name, base string, sub ...string) *Layer {
 }
 
 // Bindata returns a new Layer with the given name, it serves files from the given bindata asset.
-func Bindata(name string, fs http.FileSystem) *Layer {
-	return &Layer{name: name, fs: fs}
+func Bindata(name string, fs fs.FS) *Layer {
+	return &Layer{name: name, fs: http.FS(fs)}
 }
 
 // LayeredFS is a layered asset file-system. It works like http.FileSystem, but it can have multiple layers.