Link for EBPF_ATTACH_TYPE_BIND has type BPF_LINK_TYPE_UNSPEC instead of BPF_LINK_TYPE_PLAIN

[lmb]

Describe the bug

Checking struct bpf_link_info.type for a link backed by a EBPF_ATTACH_TYPE_BIND program shows that the value is BPF_LINK_TYPE_UNSPEC (0) instead of BPF_LINK_TYPE_PLAIN. I'd expect the latter to be the correct value due to the way the hook is initialised:

ebpf-for-windows/netebpfext/net_ebpf_ext_bind.c

Lines 83 to 84 in 571761b

	ebpf_attach_provider_data_t _net_ebpf_bind_hook_provider_data = {
	EBPF_ATTACH_PROVIDER_DATA_HEADER, EBPF_PROGRAM_TYPE_BIND_GUID, BPF_ATTACH_TYPE_BIND, BPF_LINK_TYPE_PLAIN};

OS information

No response

Steps taken to reproduce bug

See #4097

Expected behavior

bpf_link_info.type should be BPF_LINK_TYPE_PLAIN for BPF_PROG_TYPE_BIND

Actual outcome

The value is 0.

Additional details

No response