The series adds more logging and provides new REST api around topology command rpc execution to allow easier debugging of stuck topology operations.
Backport since we want to have in the production as quick as possible.
Fixes#24860Closesscylladb/scylladb#24799
* https://github.com/scylladb/scylladb:
topology coordinator: log a start and an end of topology coordinator command execution at info level
topology coordinator: add REST endpoint to query the status of ongoing topology cmd rpc