fix: add dot notation mapping in data warehouse events override

[EDsCODE]

Problem

• after feat(hogql): Use dot notation for table names #30947, insights with dot notated fields broke

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Changes

• consider mapping

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[greptile-apps]

PR Summary

This PR fixes an issue with dot notation in data warehouse events that broke insights after PR #30947 was merged.

• Added warehouse_tables_dot_notation_mapping dictionary to track relationships between dot notation names (e.g., stripe.prefix.table_name) and original table names
• Modified define_mappings function to use this mapping when looking up tables with data warehouse event modifiers
• Added test case test_data_warehouse_events_modifiers_with_dot_notation to verify dot notation works correctly with warehouse tables
• Ensures backward compatibility for existing insights that use dot-notated fields

Greptile AI

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