fix/Storage engine panics

[codecov[bot]]

Codecov Report

Attention: 292 lines in your changes are missing coverage. Please review.

Comparison is base (d1309ab) 28.81% compared to head (d413612) 28.78%.

Files	Patch %	Lines
cmd/neofs-node/storage.go	0.00%	133 Missing :warning:
cmd/neofs-node/config.go	0.00%	90 Missing :warning:
cmd/neofs-node/container.go	0.00%	21 Missing :warning:
cmd/neofs-node/morph.go	0.00%	20 Missing :warning:
cmd/neofs-node/notificator.go	0.00%	7 Missing :warning:
cmd/neofs-node/object.go	0.00%	5 Missing :warning:
cmd/neofs-node/metrics.go	0.00%	3 Missing :warning:
cmd/neofs-node/pprof.go	0.00%	3 Missing :warning:
cmd/neofs-node/attributes.go	0.00%	2 Missing :warning:
cmd/neofs-node/control.go	0.00%	2 Missing :warning:
... and 5 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2710 +/- ## ========================================== - Coverage 28.81% 28.78% -0.03% ========================================== Files 414 415 +1 Lines 32351 32371 +20 ========================================== - Hits 9321 9319 -2 - Misses 22196 22217 +21 - Partials 834 835 +1 ```

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[carpawell]

Local big suit run was ok (but I did some refactoring just right before the last push, as I love). Any big problems are not expected. Anyway, I will be able to fix them fast if the merge to the master fails.

[carpawell]

commend the refactor, but pls dont mess it with bugfix in the single commit next time

@cthulhu-rider, totally agree, but as I remember (I really tried it a few times), it just could not be fixed easily after the first two attempts without panicking somewhere else.