[prim] Remove primgen and replace with virtual cores #3766

Job	Run time
Lint (quick)	3m 1s
Build documentation	5m 40s
Airgapped build	8m 13s
Lint (slow)	8m 48s
Run OTBN crypto tests	22m 26s
Run OTBN smoke Test	2m 19s
Verilated Earl Grey	1h 24m 4s
Verible lint	1m 54s
Verilated English Breakfast	8m 4s
Build Docker Containers	3m 0s
CW305's Bitstream	22m 2s
Build and test software	22m 30s
Earl Grey for CW310 / Build bitstream	1h 6m 50s
Earl Grey for CW310 Hyperdebug / Build bitstream	1h 20m 28s
Earl Grey for CW340 / Build bitstream	1h 22m 53s
CW310 ROM Tests / FPGA test	40m 24s
CW310 Test ROM Tests / FPGA test	5m 28s
CW310 SiVal ROM_EXT Tests / FPGA test	35m 31s
CW310 ROM_EXT Tests / FPGA test	7m 54s
CW310 SiVal Tests / FPGA test	27m 50s
CW310 Manufacturing Tests / FPGA test	33m 28s
Cache bitstreams to GCP	0s
CW340 Test ROM Tests / FPGA test	5m 43s
CW340 ROM_EXT Tests / FPGA test	7m 54s
CW340 SiVal Tests / FPGA test	19m 38s
CW340 ROM Tests / FPGA test	1m 41s
CW340 Manufacturing Tests / FPGA test	40m 5s
CW340 SiVal ROM_EXT Tests / FPGA test	3m 47s
Verify FPGA jobs	29s
	10h 52m 4s

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