[topgen] Deepcopy parameter when mangeling #3584

Job	Run time
Lint (quick)	3m 14s
Lint (slow)	15m 12s
Run OTBN crypto tests	22m 2s
Build documentation	5m 3s
Airgapped build	10m 31s
CW305's Bitstream	25m 43s
Run OTBN smoke Test	2m 25s
Verible lint	1m 1s
Verilated Earl Grey	1h 27m 51s
Verilated English Breakfast	8m 20s
Build Docker Containers	2m 35s
Build and test software	20m 49s
Earl Grey for CW310 / Build bitstream	1h 9m 6s
Earl Grey for CW310 Hyperdebug / Build bitstream	1h 14m 22s
Earl Grey for CW340 / Build bitstream	1h 27m 8s
CW310 ROM Tests / FPGA test	39m 34s
CW310 Test ROM Tests / FPGA test	4m 11s
CW310 ROM_EXT Tests / FPGA test	5m 0s
CW310 SiVal Tests / FPGA test	24m 22s
CW310 Manufacturing Tests / FPGA test	29m 0s
CW310 SiVal ROM_EXT Tests / FPGA test	34m 10s
Cache bitstreams to GCP	0s
CW340 ROM_EXT Tests / FPGA test	6m 27s
CW340 ROM Tests / FPGA test	51s
CW340 SiVal ROM_EXT Tests / FPGA test	4m 27s
CW340 SiVal Tests / FPGA test	18m 36s
CW340 Manufacturing Tests / FPGA test	7m 5s
CW340 Test ROM Tests / FPGA test	3m 8s
Verify FPGA jobs	23s
	10h 12m 36s

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