The motivation is that token_metadata::get_my_id() is not available
early in the bootstrap process, as raft topology is pulled later
than new tables are registered and created, and this node is added
to topology even later.
To allow creation of compaction groups to retrieve "my id" from
token metadata early, initialization will now feed local id
into topology config which is immutable for each node anyway.
Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
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