collection: rename collectionLoader.close() to .cleanup()
collection: rename collectionLoader.close() to .cleanup()

close() and finalize() are fairly similar in connotation.
Rename .close() to .cleanup() to make it clearer that it's run to back out of
the transaction and not really part of the happy path.

Signed-off-by: Timo Beckers <98c2d5a1e48c998bd9ba9dbc53d6857beae1c9bd@isovalent.com>

cilium/ebpf,cilium/ebpf