Managerclient: improve post-restore repair progress display

[Michal-Leszczynski]

Previously all run/task properties of post-restore repair progress were taken directly from the restore progress.
This included things like start/end time, properties, status, cause and others. It resulted in misleading progress display. This commit fixes that by deliberately leaving out, inheriting, or setting interesting repair progress fields.

Fixes #4046

[Michal-Leszczynski]

Example:

miles@fedora:~/scylla-manager$ ./sctool.dev progress -c myc restore/8c97d022-a954-4554-a20b-84652d2ca0b3
Restore progress
Run:            9bf6cd94-95c7-11ef-bfce-0892040e83bb
Status:         RUNNING (enabling restored tables tombstone_gc)
Start time:     29 Oct 24 08:30:01 CET
Duration:       27s
Progress:       100% | 100%
Snapshot Tag:   sm_20241023115845UTC

╭────────────────────┬─────────────┬────────┬─────────┬────────────┬────────╮
│ Keyspace           │    Progress │   Size │ Success │ Downloaded │ Failed │
├────────────────────┼─────────────┼────────┼─────────┼────────────┼────────┤
│ system_traces      │        100% │      0 │       0 │          0 │      0 │
│ system_distributed │        100% │      0 │       0 │          0 │      0 │
│ mks                │ 100% | 100% │ 5.104k │  5.104k │     5.104k │      0 │
╰────────────────────┴─────────────┴────────┴─────────┴────────────┴────────╯

Post-restore repair progress
Run:            
Status:         DONE <- Different status
Start time:     29 Oct 24 08:30:27 CET <- Different time
End time:       29 Oct 24 08:30:28 CET
Duration:       0s
Progress:       100%
Intensity:      0
Parallel:       0
Datacenters:    
  - dc1
  - dc2

╭────────────────────┬────────────────────────┬──────────┬──────────╮
│ Keyspace           │                  Table │ Progress │ Duration │
├────────────────────┼────────────────────────┼──────────┼──────────┤
│ system_distributed │      view_build_status │ 100%     │ 0s       │
├────────────────────┼────────────────────────┼──────────┼──────────┤
│ system_traces      │                 events │ 100%     │ 0s       │
│ system_traces      │          node_slow_log │ 100%     │ 0s       │
│ system_traces      │ node_slow_log_time_idx │ 100%     │ 0s       │
│ system_traces      │               sessions │ 100%     │ 0s       │
│ system_traces      │      sessions_time_idx │ 100%     │ 0s       │
╰────────────────────┴────────────────────────┴──────────┴──────────╯

[Michal-Leszczynski]

@karol-kokoszka This PR is ready for review!