backport: merge bitcoin#23060, #24164, #23565, #24337, #27682, #29208, #29091, #29165, #29934, #30261, partial bitcoin#27662, #28210, #28348, #30263 (bump minimum compiler)

backport: merge bitcoin#23060, #24164, #23565, #24337, #27682, #29208, #29091, #29165, #29934, #30261, partial bitcoin#27662, #28210, #28348, #30263 (bump minimum compiler) #1298