Globally serialize XNNPACK execution, add logging (#19742) #6127

Job	Run time
test-arm / test-backend-macos	0s
test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job	18m 23s
test-arm / test-backend-linux (arm_vgf_fp, operators) / linux-job	29m 12s
test-arm / test-backend-linux (arm_ethos_u85, models) / linux-job	41m 16s
test-arm / test-backend-linux (arm_ethos_u55, models) / linux-job	42m 17s
test-arm / test-backend-linux (arm_vgf_int, operators) / linux-job	1h 7m 10s
test-arm / test-backend-linux (arm_vgf_int, models) / linux-job	33m 38s
test-arm / test-backend-linux (arm_tosa_int, models) / linux-job	31m 59s
test-arm / test-backend-linux (arm_tosa_int, operators) / linux-job	56m 56s
test-arm / test-backend-linux (arm_ethos_u85, operators) / linux-job	1h 16m 35s
test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job	22m 19s
test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job	18m 57s
test-arm / test-backend-linux (arm_ethos_u55, operators) / linux-job	1h 16m 46s
test-arm / package-golden-artifacts	48s
	8h 36m 16s

Provide feedback