The new storage implementation is sufficiently large a change that it
warrants a period of testing. To facilitate testing the new and old
implementations side by side we slightly abuse cargo's feature flags and
add a storage-v2 feature which enables the new storage and disables the
old storage.
Note that this commit doesn't use `--all-features` when building the
workspace in scripts/ci/build-test. This will be rectified in a later
commit once the storage-v2 feature is integrated into the other crates
in the workspace.
Signed-off-by: Alex Good <alex@memoryandthought.me>
