sharness: don't run go-ipfs instance with default config

It conflicts with already running instance on the Dev's machine so running this test requires disabling the normal ipfs. The launch of ipfs here doesn't test much as we compare the config, after initing from it and we also launch from default config in many other cases (with few variables changed to not conflict with already running standalone ipfs instance). License: MIT Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>