Exclude backup shards from limit

[kunga]

In Scheme Shard we check shard limit excluding backup shards:

https://github.com/ydb-platform/ydb/blob/98f1bfcb2b2302a3cfd4d315a63ef55babc136e2/ydb/core/tx/schemeshard/schemeshard_path.cpp#L754

So we should also exclude them in UI checks: https://jing.yandex-team.ru/files/kungasc/2025-01-16_13-37-41.png

Now the bug leads to false-positive EMERGENCY status

[antonkovalenko]

@vporyadke looks like this exclusion has do be done at hc api side?

[vporyadke]

@vporyadke looks like this exclusion has do be done at hc api side?

yes, HC is missing this check

[kunga]

Perhaps we need two numbers in UI (also show backup shards count), not just subtract them on the backend