Fixes `sendBits()`'s handling of signed numbers in `svsim` (#4599) #3173

Job	Run time
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Integration Tests	13m 8s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Formatting	1m 29s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / ci	22m 34s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / compile project with mill	6m 16s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Benchmarking Sanity Check	2m 41s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Standard Library (2.13.15)	4m 29s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Build Mdoc & Website	6m 37s
ci (ubuntu-22.04, 8, 2.13.15, 2.4, 7.0) / Test Scala-CLI Example / Build and Test	3m 5s
check tests	1s
all tests passed	1s
Deploy Website	6s
publish	7m 52s
	1h 8m 19s

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