SEATTLE — As one of the first big bands to suspend its tour plans, Pearl Jam’s packed schedule abruptly cleared when the pandemic hit in 2020. Come May, the Seattle juggernauts will finally set off on a run of makeup shows after fans have been waiting two years to hear some of the daring new(er) tunes off “Gigaton,” the band’s 11th album, born just as the world was shutting down. But on the plus side, the unexpected down time produced a rush of new side projects and archive-mining releases for fans to nibble until the next stadium singalong. Among them, Pearl Jam guitar slayer Mike McCready’s …