Add example for QUOTE() (#16958)

[ti-chi-bot]

This is an automated cherry-pick of #16958

What is changed, added or deleted? (Required)

Closes #16942

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• v8.1 (TiDB 8.1 versions)
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• v5.3 (TiDB 5.3 versions)
• v5.2 (TiDB 5.2 versions)
• v5.1 (TiDB 5.1 versions)
• v5.0 (TiDB 5.0 versions)

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• Delete files
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• Need modification after applied to another branch
• Might cause conflicts after applied to another branch

[Oreoxmt]

/approve

[ti-chi-bot]

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