enable gofumpt formatter

Based on our discussion gofumpt won the vote so use that one via
golangci-lint.

https://github.com/containers/podman/discussions/27291

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

pkg/api/server/handler_api.go

@@ -99,6 +99,7 @@ func (w *BufferedResponseWriter) Flush() {
 		wrapped.Flush()
 	}
 }
+
 func newBufferedResponseWriter(rw http.ResponseWriter) *BufferedResponseWriter {
 	return &BufferedResponseWriter{
 		bufio.NewWriterSize(rw, 8192),