utils: logalloc: move reclaim timer destructor for more readability
utils: logalloc: move reclaim timer destructor for more readability

Signed-off-by: Michael Livshin <ae60993c65de9cdf2ca07b7426c976808535d555@scylladb.com>

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