Link real IMM_ROM_EXT into ROM_EXT #3587

Job	Run time
Lint (quick)	3m 15s
Build documentation	5m 6s
Airgapped build	8m 45s
Lint (slow)	15m 32s
Run OTBN smoke Test	2m 21s
Run OTBN crypto tests	20m 47s
Verible lint	1m 42s
Build Docker Containers	2m 33s
CW305's Bitstream	19m 11s
Build and test software	3m 19s
Verilated Earl Grey	20m 48s
Verilated English Breakfast	8m 26s
Earl Grey for CW310 / Build bitstream	19m 58s
Earl Grey for CW310 Hyperdebug / Build bitstream	19m 57s
Earl Grey for CW340 / Build bitstream	19m 9s
CW310 ROM Tests	1s
CW310 ROM_EXT Tests	1s
CW310 Test ROM Tests	1s
CW340 SiVal Tests	1s
CW340 ROM_EXT Tests	1s
CW340 ROM Tests	1s
CW340 SiVal ROM_EXT Tests	1s
CW340 Test ROM Tests	1s
CW340 Manufacturing Tests	1s
Cache bitstreams to GCP	1s
CW310 Manufacturing Tests	1s
CW310 SiVal Tests	1s
CW310 SiVal ROM_EXT Tests	1s
Verify FPGA jobs	1s
	2h 51m 3s

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