feat: clean up `p2p` & implement missing peering functionality #7938

Job	Run time
setup	3s
Run Main (github-bot) / Go Build / generated	7s
Run Main (github-bot) / Go Lint / lint	22s
Run Main (github-bot) / Go Test / test	33s
Run Main (gnodev) / Go Build / generated	10s
Run Main (gnodev) / Go Lint / lint	47s
Run Main (gnodev) / Go Test / test	1m 22s
Run Main (gnofaucet) / Go Build / generated	10s
Run Main (gnofaucet) / Go Lint / lint	31s
Run Main (gnofaucet) / Go Test / test	45s
Run Main (gnogenesis) / Go Build / generated	9s
Run Main (gnogenesis) / Go Lint / lint	38s
Run Main (gnogenesis) / Go Test / test	50s
Run Main (gnohealth) / Go Build / generated	17s
Run Main (gnohealth) / Go Lint / lint	33s
Run Main (gnohealth) / Go Test / test	34s
Run Main (gnokeykc) / Go Build / generated	11s
Run Main (gnokeykc) / Go Test / test	46s
Run Main (gnokeykc) / Go Lint / lint	33s
Run Main (gnomd) / Go Build / generated	7s
Run Main (gnomd) / Go Lint / lint	31s
Run Main (gnomigrate) / Go Lint / lint	31s
Run Main (gnomd) / Go Test / test	33s
Run Main (gnomigrate) / Go Build / generated	5s
Run Main (gnomigrate) / Go Test / test	35s
	11m 43s

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