ignore G events involving KAGRA in superevents
Policy decided after discussion on https://wiki.ligo.org/Bursts/EMFollow/Telecon20231108
Ignore events involving KAGRA. At the same time start a discussion with AllSky about implementing a pipeline wide policy to ignore KAGRA for online searches at the start of O4b https://wiki.ligo.org/CBC/Searches/AllSkyCall20231106
Not needed for v2.1.9 release.