It is ambigous, use the appropriate no-gc or gc-all factories instead,
as appropriate.
A special note for mutation::compacted(): according to the comment above
it, it doesn't drop expired tombstones but as it is currently, it
actually does. Change the tombstone gc param for the underlying call to
compact_for_compaction() to uphold the comment. This is used in tests
mostly, so no fallout expected.
Tests are handled in the next commit, to reduce noise.
Two tests in mutation_test.cc have to be updated:
* test_compactor_range_tombstone_spanning_many_pages
has to be updated in this commit, as it uses
mutation_partition::compact_for_query() as well as
compact_for_query(). The test passes default constructed
tombstone_gc() to the latter while the former now uses no-gc
creating a mismatch in tombstone gc behaviour, resulting in test
failure. Update the test to also pass no-gc to compact_for_query().
* test_query_digest similarly uses mutation_partition::query_mutation()
and another compaction method, having to match the no-gc now used in
query_mutation().
3c34598d88