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>

test/e2e/diff_test.go

@@ -13,7 +13,6 @@ import (
 )
 
 var _ = Describe("Podman diff", func() {
-
 	It("podman diff of image", func() {
 		session := podmanTest.Podman([]string{"diff", ALPINE})
 		session.WaitWithDefaultTimeout()