chore(tests): add explain for sync agg index

[ariesdevil]

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Summary

Add sqllogictests for sync aggregating index.
set enable_refresh_aggregating_index_after_write default to 1
also set enable_refresh_virtual_column_after_write to 1
cc @b41sh

Fixes #14046

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe): add tests

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This change is 

[BohuTANG]

We should:

1. set enable_refresh_aggregating_index_after_write default to 1? It's better to allow user to disable a settings but not let them to enable it when they use, user always never know when to enable it.
2. We also need add the introduce of SYNC to doc.

[BohuTANG]

LGTM