astoycos 82039144bd integration-test: Add map pinning coverage
Add coverage to the new public api's for
map pinning (pin and unpin) which can be called
on the generic aya::Map type OR explit map types.

Additionally add coverage for the new libbpf
LIBBPF_PIN_BY_NAME behavior.

Signed-off-by: astoycos <astoycos@redhat.com>
..
ext.bpf.c integration-test: avoid reliance on kernel headers
main.bpf.c integration-test: avoid reliance on kernel headers
multimap-btf.bpf.c integration-test: Add map pinning coverage
reloc.bpf.c integration-test: De-duplicate BTF relocation test
text_64_64_reloc.c integration-test: avoid reliance on kernel headers