Add interface{} to any replacement to make fmt, exclude *.pb.go (#30461)

Since https://github.com/go-gitea/gitea/pull/25686, a few `interface{}`
have sneaked into the codebase. Add this replacement to `make fmt` to
prevent this from happening again.

Ideally a linter would do this, but I haven't found any suitable.

services/actions/auth_test.go

@@ -20,7 +20,7 @@ func TestCreateAuthorizationToken(t *testing.T) {
 	assert.Nil(t, err)
 	assert.NotEqual(t, "", token)
 	claims := jwt.MapClaims{}
-	_, err = jwt.ParseWithClaims(token, claims, func(t *jwt.Token) (interface{}, error) {
+	_, err = jwt.ParseWithClaims(token, claims, func(t *jwt.Token) (any, error) {
 		return setting.GetGeneralTokenSigningSecret(), nil
 	})
 	assert.Nil(t, err)