Link real IMM_ROM_EXT into ROM_EXT #4756

Job	Run time
Lint (quick)	3m 12s
Build documentation	5m 13s
Lint (slow)	11m 55s
CW305's Bitstream	23m 19s
Airgapped build	8m 18s
Run OTBN smoke Test	2m 28s
Run OTBN crypto tests	3m 2s
Verible lint	1m 21s
Verilated English Breakfast	8m 26s
Verilated Earl Grey	1h 23m 40s
Build Docker Containers	2m 51s
Build and test software	14m 14s
Earl Grey for CW310 / Build bitstream	1h 6m 49s
Earl Grey for CW310 Hyperdebug / Build bitstream	1h 10m 53s
Earl Grey for CW340 / Build bitstream	1h 24m 13s
CW310 ROM Tests / FPGA test	40m 42s
CW310 Test ROM Tests / FPGA test	5m 15s
CW310 SiVal ROM_EXT Tests / FPGA test	35m 44s
CW310 SiVal Tests / FPGA test	26m 2s
CW310 Manufacturing Tests / FPGA test	28m 58s
CW310 ROM_EXT Tests / FPGA test	11m 53s
Cache bitstreams to GCP	0s
CW340 ROM_EXT Tests / FPGA test	5m 25s
CW340 ROM Tests / FPGA test	47s
CW340 SiVal Tests / FPGA test	17m 48s
CW340 SiVal ROM_EXT Tests / FPGA test	4m 12s
CW340 Test ROM Tests / FPGA test	2m 55s
CW340 Manufacturing Tests / FPGA test	40m 16s
Verify FPGA jobs	19s
	10h 10m 10s

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