keys: remove `with_linearized` uses
keys: remove `with_linearized` uses

There is a variant of `to_hex` that works with `managed_bytes_view`,
no need to linearize.

Tests: unit(dev)

[avi: edit out unneeded std::ref()]

Signed-off-by: Pavel Solodovnikov <2cf5887fafb117b7ff3e29b9720a7305c3313494@scylladb.com>
Message-Id: <20210828093252.650928-1-2cf5887fafb117b7ff3e29b9720a7305c3313494@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla