Add prater boot nodes (#8623)

* Add bootnodes

* Typos

* Add sigp's lighthouse node

Author: terencechain

shared/params/testnet_prater_config.go

@@ -10,7 +10,14 @@ func UsePraterNetworkConfig() {
 	cfg := BeaconNetworkConfig().Copy()
 	cfg.ContractDeploymentBlock = 4367322
 	cfg.BootstrapNodes = []string{
-		// TODO(8612): Define bootstrap nodes.
+		// Prysm's bootnode
+		"enr:-Ku4QFmUkNp0g9bsLX2PfVeIyT-9WO-PZlrqZBNtEyofOOfLMScDjaTzGxIb1Ns9Wo5Pm_8nlq-SZwcQfTH2cgO-s88Bh2F0dG5ldHOIAAAAAAAAAACEZXRoMpDkvpOTAAAQIP__________gmlkgnY0gmlwhBLf22SJc2VjcDI1NmsxoQLV_jMOIxKbjHFKgrkFvwDvpexo6Nd58TK5k7ss4Vt0IoN1ZHCCG1g",
+		// Lighthouse's bootnode by Afri
+		"enr:-LK4QH1xnjotgXwg25IDPjrqRGFnH1ScgNHA3dv1Z8xHCp4uP3N3Jjl_aYv_WIxQRdwZvSukzbwspXZ7JjpldyeVDzMCh2F0dG5ldHOIAAAAAAAAAACEZXRoMpB53wQoAAAQIP__________gmlkgnY0gmlwhIe1te-Jc2VjcDI1NmsxoQOkcGXqbCJYbcClZ3z5f6NWhX_1YPFRYRRWQpJjwSHpVIN0Y3CCIyiDdWRwgiMo",
+		// Lighthouse's bootnode by Sigp
+		"enr:-LK4QLINdtobGquK7jukLDAKmsrH2ZuHM4k0TklY5jDTD4ZgfxR9weZmo5Jwu81hlKu3qPAvk24xHGBDjYs4o8f1gZ0Bh2F0dG5ldHOIAAAAAAAAAACEZXRoMpB53wQoAAAQIP__________gmlkgnY0gmlwhDRN_P6Jc2VjcDI1NmsxoQJuNujTgsJUHUgVZML3pzrtgNtYg7rQ4K1tkWERgl0DdoN0Y3CCIyiDdWRwgiMo",
+		// Teku's bootnode By Afri
+		"enr:-KG4QCIzJZTY_fs_2vqWEatJL9RrtnPwDCv-jRBuO5FQ2qBrfJubWOWazri6s9HsyZdu-fRUfEzkebhf1nvO42_FVzwDhGV0aDKQed8EKAAAECD__________4JpZIJ2NIJpcISHtbYziXNlY3AyNTZrMaED4m9AqVs6F32rSCGsjtYcsyfQE2K8nDiGmocUY_iq-TSDdGNwgiMog3VkcIIjKA",
 	}
 	OverrideBeaconNetworkConfig(cfg)
 }