[Integration] Fixes loader chain ID

[yhassanzadeh13]

Fixes the chain ID of the loader as the mitigation to the following crash-loop on benchnet1:

calling get account for service account client: rpc error: code = InvalidArgument desc = address 8c5303eaa26202d6 is invalid for chain flow-benchnet"
Jul 30 23:12:39 loader-001 systemd[1]: flow-loader.service: Main process exited, code=exited, status=1/FAILURE

[codecov-commenter]

Codecov Report

Merging #1084 (c426663) into master (c030509) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1084      +/-   ##
==========================================
+ Coverage   53.32%   53.36%   +0.04%     
==========================================
  Files         318      318              
  Lines       21559    21559              
==========================================
+ Hits        11496    11505       +9     
+ Misses       8492     8480      -12     
- Partials     1571     1574       +3     

Flag	Coverage Δ
unittests	53.36% <ø> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
engine/common/synchronization/engine.go	64.01% <0.00%> (ø)
cmd/util/ledger/migrations/storage_v4.go	42.16% <0.00%> (+0.60%)	⬆️
...sus/approvals/assignment_collector_statemachine.go	50.00% <0.00%> (+7.69%)	⬆️

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