`object_at_version` flaky test

[DaughterOfMars]

Bug description

After #9712, the object_at_version test in iota-graphql-e2e-tests is flaky.

Context

Components (select all that apply):

• iota-indexer
• iota-json-rpc
• iota-graphql-rpc
• Other: __________

Issue type (select one):

• JSON-RPC API bug (failing request, unexpected response, etc.)
• Crate bug (logic bug, runtime error, performance issue, etc.)