[multitop] Refactor DIF and testutils #5889

Job	Run time
Lint (quick)	3m 39s
Build documentation	5m 26s
Run OTBN crypto tests	2m 56s
Airgapped build	11m 26s
Run OTBN smoke Test	3m 28s
Verible lint	1m 9s
Lint (slow)	12m 23s
Verilated Earl Grey	1h 8m 29s
Verilated English Breakfast	3m 37s
Build Docker Containers	3m 14s
CW305's Bitstream	2m 28s
Build and test Darjeeling software	3m 42s
QEMU smoketest	2m 25s
Build and test software	20m 32s
Earl Grey for CW310 / Build bitstream	2m 59s
Earl Grey for CW310 Hyperdebug / Build bitstream	1h 4m 19s
Earl Grey for CW340 / Build bitstream	1h 32m 28s
CW310 Test ROM Tests / FPGA test	4m 17s
CW310 ROM Tests / FPGA test	38m 20s
CW310 SiVal Tests / FPGA test	22m 35s
Hyper310 ROM_EXT Tests / FPGA test	11m 16s
CW310 SiVal ROM_EXT Tests / FPGA test	33m 17s
CW310 Manufacturing Tests / FPGA test	27m 51s
Cache bitstreams to GCP	0s
CW340 ROM Tests / FPGA test	42s
CW340 ROM_EXT Tests / FPGA test	5m 10s
CW340 SiVal Tests / FPGA test	16m 8s
CW340 Manufacturing Tests / FPGA test	39m 30s
CW340 SiVal ROM_EXT Tests / FPGA test	5m 16s
CW340 Test ROM Tests / FPGA test	3m 18s
Verify FPGA jobs	33s
	8h 32m 53s

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