Currently the function uses a regular expression
to check the system log for a specific message.
This is tangential to the ability to cleanly abort the restore task, plus the regular expression has a syntax error:
```
test/cluster/object_store/test_backup.py:534
/home/bhalevy/dev/scylla/test/cluster/object_store/test_backup.py:534: SyntaxWarning: "\(" is an invalid escape sequence. Such sequences will not work in the future. Did you mean "\\("? A raw string is also an option.
await wait_for_first_completed([l.wait_for("Failed to handle STREAM_MUTATION_FRAGMENTS \(receive and distribute phase\) for .+: Streaming aborted", timeout=10) for l in logs])
```
Thsi change modernizes the implementation by:
- using auto_dc_rack for manager.servers_add
- using new_test_keyspace to generate and auto delete the keyspace
- using async gatherio and a prepared statement to insert the data
- simplifing the keys and values by NOT using os.urandom (that is notoriously slow)
- inserting fewer keys in debug mode
- removing the log check
With that, the test can be reenabled in all modes.
* No backport needed since the test was disabled
Closesscylladb/scylladb#27892
* github.com:scylladb/scylladb:
test_backup: do_abort_restore: reduce data footprint
test_backup: do_abort_restore: use error injection
test_backup: do_abort_restore: use asyncio for cql
test_backup: do_abort_restore: use new_test_keyspace
test_backup: do_abort_restore: use logger rather than print
test_backup: do_abort_restore: pass auto_rack_dc to servers_add
9b4a7f1d14