Add Test Coverage for processGameLogout Function

[coderabbitai[bot]]

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The function processGameLogout in the file packages/nps/gameMessageProcessors/processGameLogout.ts lacks test coverage. It is important to ensure that its behavior, particularly the acknowledgment sending and promise resolution, is verified through tests.

Please refer to the following PR and comment for more context:

• PR: https://github.com/rustymotors/server/pull/2037
• Comment: https://github.com/rustymotors/server/pull/2037#discussion_r1724151959