Use BitvecFlags in vector storages
#6994
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* put all flags impls in a single module * use in appendable_dense_vector_storage * use in appendable_mmap_multi_dense_storage * use in mmap_sparse_vector_storage * clippy * Add comment we cannot rely on length of deleted vectors bitvec --------- Co-authored-by: timvisee <tim@visee.me>
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To appropriately buffer writes to the deleted bitslice in the vector storages, we need to have a structure like
BitvecFlagswhich buffers updates, but also keeps a fast in-memory copy of the bitslice.In #6990 we introduced the structure. This PR does two things:
BitvecFlagswhereDynamicMmapFlagswas being used directly.