net: Move NET_TCP/UDP_HAVE_STACK to netconfig.h

[wengzhe]

Summary

Now the HAVE_PFINET(6)_SOCKETS depends on NET_TCP/UDP_HAVE_STACK, which is previously defined in net/ folder and cannot be included. Considering many places use this check, maybe moving them to netconfig.h could be better.

Impact

Before: IPv4 + TCP, without ICMP -> HAVE_PFINET_SOCKETS is undefined, we cannot use TCP socket (error is EAFNOSUPPORT)
After: IPv4 + TCP, without ICMP -> HAVE_PFINET_SOCKETS is defined, we can use TCP socket

Testing

QEMU with CONFIG_NET_IPv4 & CONFIG_NET_TCP enabled but CONFIG_NET_ICMP_SOCKET disabled.

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✅ wengzhe
❌ PetervdPerk-NXP
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