IGNITE-23138 Fix TxWithKeyContentionSelfTest (Cache 12 group)

[superminkfan]

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[superminkfan]

https://ci2.ignite.apache.org/buildConfiguration/IgniteTests24Java8_Cache12/8080567

https://ci2.ignite.apache.org/buildConfiguration/IgniteTests24Java8_Cache12/8080691

https://ci2.ignite.apache.org/buildConfiguration/IgniteTests24Java8_Cache12/8080699

https://ci2.ignite.apache.org/buildConfiguration/IgniteTests24Java8_Cache12/8080701