backport: merge bitcoin#24866, #25612, #28432, #28757, #28845, #28932, #28973, #21778, #30204, #29765, #30201, #30287, #30511 (toolchain backports: part 3)

backport: merge bitcoin#24866, #25612, #28432, #28757, #28845, #28932, #28973, #21778, #30204, #29765, #30201, #30287, #30511 (toolchain backports: part 3) #1462