Fix ds data cannot be unwind

[zjg555543]

When restarting RPC erigon, ds maybe lost data. While restart rpc again, it's always failed while running UnwindIfNecessary to call TruncateFile

• TruncateFile got an error like:Truncate not allowed, atomic operation in progress from zkevm-data-streamer
• TruncateFile required stream.atomicOp.status == aoNone
• So the order of StartAtomicOp and UnwindIfNecessary is adjusted here.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[mandrigin]

@hexoscott can you check because I thought you have been fixing something like that

[hexoscott]

I have this same change in the unwinds branch, we should merge this though as unwinds could take a little while.