LPM: migrate from net package types to net/netip package types

[nurlybekovnt]

1. Package netip defines a IP address type that's a small value type. Building on that Addr type, the package also defines AddrPort (an IP address and a port), and Prefix (an IP address and a bit length prefix). Compared to the net.IP type, this package's Addr type takes less memory, is immutable, and is comparable (supports == and being a map key). Therefore, the use of net.IP/net.IPNet is not recommended.
2. Updated Golang version and depending packages