We currently ignore the `_excluded` field in `node::clone()` and the verbose
formatter of `locator::node`. The first one is a bug that can have
unpredictable consequences on the system. The second one can be a minor
inconvenience during debugging.
We fix both places in this PR.
Fixes https://scylladb.atlassian.net/browse/SCYLLADB-72
This PR is a bugfix that should be backported to all supported branches.
Closesscylladb/scylladb#27265
* github.com:scylladb/scylladb:
locator/node: include _excluded in verbose formatter
locator/node: preserve _excluded in clone()