fix(gnovm): use strconv.UnquoteChar to parse rune literals #7265

Job	Run time
setup	3s
Run Main (github-bot) / Go Linter / lint	24s
Run Main (github-bot) / Go Build / generated	7s
Run Main (gnodev) / Go Build / generated	7s
Run Main (github-bot) / Go Test / test	14s
Run Main (gnodev) / Go Linter / lint	40s
Run Main (gnofaucet) / Go Build / generated	7s
Run Main (gnodev) / Go Test / test	57s
Run Main (gnofaucet) / Go Linter / lint	19s
Run Main (gnofaucet) / Go Test / test	17s
Run Main (gnogenesis) / Go Build / generated	7s
Run Main (gnogenesis) / Go Linter / lint	22s
Run Main (gnogenesis) / Go Test / test	19s
Run Main (gnohealth) / Go Build / generated	10s
Run Main (gnohealth) / Go Linter / lint	17s
Run Main (gnohealth) / Go Test / test	13s
Run Main (gnokeykc) / Go Build / generated	7s
Run Main (gnokeykc) / Go Test / test	15s
Run Main (gnokeykc) / Go Linter / lint	22s
Run Main (gnomd) / Go Build / generated	10s
Run Main (gnomd) / Go Test / test	16s
Run Main (gnomd) / Go Linter / lint	22s
Run Main (gnomigrate) / Go Build / generated	12s
Run Main (gnomigrate) / Go Linter / lint	17s
Run Main (gnomigrate) / Go Test / test	25s
	7m 9s

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