feat(metric-engine): introduce RowModifier for MetricEngine

[WenyXu]

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Refer to a related PR or issue link (optional)

#5282

What's changed and what's your intention?

Introduce RowModifier for MetricEngine. It modifies rows for different primary key encoding.

For PrimaryKeyEncoding::Sparse encoding, the primary key columns are replaced with the encoded primary key column(__encoded_primary_key). For PrimaryKeyEncoding::Dense encoding, it adds two columns(__table_id, __tsid) to the row.

PR Checklist

Please convert it to a draft if some of the following conditions are not met.

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.
• API changes are backward compatible.
• Schema or data changes are backward compatible.

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[fengjiachun]

LGTM