[fix] Relocate anchor2vec outside the model

[hglee98]

Description

This PR addresses the model compression issues mentioned in #582 by restructuring the Anchor2Vec implementation for compatibility with PyNetsPresso compression framework.

Related to #582

Changes

• Relocate Anchor2Vec module outside the model architecture to enable proper compression
• Refactor Anchor2Vec logic for improved functionality
• Add reg_max configuration parameter to both loss function and post-processor components

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