[Issue 13854][broker] Fix call sync method in async rest api for internalGetPartitionedStatsInternal

[Jason918]

Master Issue: #13854

Motivation

See #13854

Verifying this change

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Does this pull request potentially affect one of the following parts:

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• Dependencies (does it add or upgrade a dependency): (no)
• The public API: (no)
• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (no)

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