Simple Fees - HAPI tests for Consensus Service - ConsensusDeleteTopic

Implement HAPI tests suite validating Simple Fees behaviour for Consensus Service - ConsensusDeleteTopic transaction under HIP-1261. The suite should cover positive, negative and corner cases, exercising different key shapes, signature patterns and extras (e.g. additional signatures, keys, etc.) to confirm that fee calculation, charging in USD and error handling follow the new Simple Fees logic and requirements.

Start by locating the existing HAPI test suite and the ConsensusDeleteTopic transaction tests in the repository, then read HIP-1261 and the Simple Fees requirements. Add coverage for positive, negative, and corner cases involving key shapes, signature patterns, and extras, and confirm fee calculation, USD charging, and error handling.

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