feat(stdlibs): simplify time pkg & remove tz + monoclock logic related #6313

Job	Run time
setup	3s
Run Main (gnodev) / Go Build / generated	12s
Run Main (gnodev) / Go Test / test	51s
Run Main (gnodev) / Go Linter / lint	40s
Run Main (gnofaucet) / Go Build / generated	13s
Run Main (gnofaucet) / Go Linter / lint	16s
Run Main (gnofaucet) / Go Test / test	14s
Run Main (gnogenesis) / Go Build / generated	12s
Run Main (gnogenesis) / Go Linter / lint	28s
Run Main (gnogenesis) / Go Test / test	25s
Run Main (gnokeykc) / Go Linter / lint	25s
Run Main (gnokeykc) / Go Build / generated	8s
Run Main (gnokeykc) / Go Test / test	23s
Run Main (gnomd) / Go Linter / lint	25s
Run Main (gnomd) / Go Build / generated	11s
Run Main (gnomd) / Go Test / test	22s
Run Main (gnomigrate) / Go Build / generated	6s
Run Main (gnomigrate) / Go Linter / lint	25s
Run Main (gnomigrate) / Go Test / test	22s
	6m 21s

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