Fixes `sendBits()`'s handling of signed numbers in `svsim`'s `simulation-driver` in #4593 #3155

Job	Run time
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / ci	21m 48s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Formatting	1m 34s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Integration Tests	13m 26s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / compile project with mill	6m 14s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Benchmarking Sanity Check	2m 44s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Standard Library (2.13.15)	4m 50s
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 39s
check tests	1s
all tests passed	1s
Deploy Website	0s
publish	0s
	1h 0m 2s

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