Fixes `sendBits()`'s handling of signed numbers in `svsim`'s `simulation-driver` in #4593 #3170

Job	Run time
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / compile project with mill	5m 59s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / compile project with mill	5m 59s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / ci	21m 33s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / ci	21m 33s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Benchmarking Sanity Check	2m 46s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Benchmarking Sanity Check	2m 46s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Formatting	1m 40s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Formatting	1m 40s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Integration Tests	12m 52s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Integration Tests	12m 52s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Standard Library (2.13.15)	4m 44s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Standard Library (2.13.15)	4m 44s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Build Mdoc & Website	6m 13s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Build Mdoc & Website	6m 45s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Test Scala-CLI Example / Build and Test	2m 45s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Test Scala-CLI Example / Build and Test	2m 45s
check tests	0s
check tests	1s
all tests passed	1s
all tests passed	1s
Deploy Website	0s
Deploy Website	0s
publish	0s
publish	0s
	1h 57m 39s

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