n-acd: using ebpf is decided at runtime

Modify n-acd library to use ebpf whenever it is possible.
This is done by always making a `sys_call` for bpf resources. If this
call fails program continues to run normally the only difference is that
ebpf is not used.

Edit the test for bpf map to only run when bpf map is successfully
created.
58 jobs for fix-eBPF in 38 minutes and 12 seconds (queued for 6 seconds)
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