test(ilm): re-enable test_transition_and_restore_flows; fix test-util disk-open and restore error-path lock (#4945)

test(ilm): re-enable test_transition_and_restore_flows; fix test-util disk-open and restore error-path lock (rustfs/backlog#1303)

The excluded test's 'missing xl.meta ... on disk2' was NOT an EC
metadata-distribution issue: after a transition all four shard disks hold
a fully consistent xl.meta (verified by decoding each shard). The panic
came from the tier test util's open_disk, which hardcoded disk_index 0
for every disk path; LocalDisk::new validates the endpoint's
(set_idx, disk_idx) against the disk's own format.json and rejected every
non-slot-0 disk with InconsistentDisk, which read_transition_meta
collapsed into 'missing xl.meta'. Derive the real indices from
format.json instead. This also un-breaks free_version_count /
wait_for_free_version_absence for non-first disks (silently 0 before).

With that fixed, the test advanced to the #4877 restore self-deadlock,
whose main paths #4886 already fixed. Complete that fix on the one path
it missed: update_restore_metadata (the restore-failure metadata
rewrite) still rebuilt copy_object options with no_lock=false and would
re-acquire the object write lock the restore handler already holds.
Propagate the caller's no_lock there too.

Remove the test from the serial-lane exclusion list; the four remaining
exclusions are unrelated known issues and stay.

crates/scanner/tests/lifecycle_integration_test.rs

@@ -734,7 +734,7 @@ mod serial_tests {
 
     #[tokio::test(flavor = "multi_thread", worker_threads = 1)]
     #[serial]
-    #[ignore = "FAILING on main: excluded from the serial ILM lane pending a fix, see rustfs/backlog#1148 (ilm-1 partial)"]
+    #[ignore = "global-state ILM integration test: runs serialized in the CI ILM Integration (serial) lane, see ci.yml test-ilm-integration-serial and rustfs/backlog#1148 (ilm-1)"]
     async fn test_transition_and_restore_flows() {
         let (disk_paths, ecstore) = setup_test_env().await;