Fix destroy: delete profiles before networks to avoid "in use" error

[jpaussa]

Profiles reference the networks, so Incus refuses to delete a network while a profile still holds a device entry for it.
before fix:

jdp@coi:~/bpfrx$ ./test/incus/setup.sh destroy
==> Instance bpfrx-fw does not exist
Also remove networks and profiles? [y/N] y
==> Deleting network bpfrx-trust
Error: The network is currently in use

after fix:

jdp@coi:~/bpfrx$ ./test/incus/setup.sh destroy
==> Instance bpfrx-fw does not exist
Also remove networks and profiles? [y/N] y
==> Deleting profile bpfrx-vm
Profile bpfrx-vm deleted
==> Deleting profile bpfrx-container
Profile bpfrx-container deleted
==> Deleting network bpfrx-trust
Network bpfrx-trust deleted
==> Deleting network bpfrx-untrust
Network bpfrx-untrust deleted
==> Deleting network bpfrx-dmz
Network bpfrx-dmz deleted
==> Deleting network bpfrx-tunnel
Network bpfrx-tunnel deleted
==> Destroy complete.

[jpaussa]

Urgh, it also added this to the commit, claude said there was no reason to pin to version 21 so I just got it to remove the pin.
Have told claude to use branches:

jdp@coi:~/bpfrx$ make generate
go generate ./pkg/dataplane/...
go: downloading go1.24.9 (linux/amd64)
go: downloading github.com/vishvananda/netlink v1.3.1
go: downloading github.com/cilium/ebpf v0.20.0
go: downloading golang.org/x/sys v0.40.0
go: downloading github.com/vishvananda/netns v0.0.5
Error: exec: "llvm-strip-21": executable file not found in $PATH
exit status 1
pkg/dataplane/loader.go:14: running "go": exit status 1
make: *** [Makefile:15: generate] Error 1

jdp@coi:~/bpfrx$ make generate
go generate ./pkg/dataplane/...
In file included from /home/jdp/bpfrx/bpf/xdp/xdp_main.c:12:
/home/jdp/bpfrx/bpf/xdp/../headers/bpfrx_helpers.h:606:2: warning: loop not unrolled: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Wpass-failed=transform-warning]
  606 |         for (__u32 i = 0; i < MAX_FILTER_RULES_PER_FILTER; i++) {
      |         ^
1 warning generated.
/home/jdp/bpfrx/bpf/xdp/xdp_zone.c:96:4: warning: loop not unrolled: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Wpass-failed=transform-warning]
   96 |                         for (__u32 ni = 0; ni < MAX_NAT64_PREFIXES; ni++) {
      |                         ^
1 warning generated.
/home/jdp/bpfrx/bpf/xdp/xdp_policy.c:847:7: warning: loop not unrolled: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering [-Wpass-failed=transform-warning]
  847 |                                                 for (__u32 ni = 0; ni < MAX_NAT64_PREFIXES; ni++) {
      |                                                 ^
1 warning generated.