fix: fix labelling of addresses in Setup.sol

[DeVikingMark]

Description

Fixes address labeling issue in Setup.sol where proxy addresses were labeled twice. Changes include:

• Remove duplicate labels for proxy contracts
• Keep only "Proxy" suffix labels for proxy contracts
• Maintain special labels for non-proxy contracts (AddressManager, L1CrossDomainMessenger_aliased)

This makes address labeling more consistent and eliminates confusion during debugging.

Tests

Existing tests cover these changes since:

• Changes only affect debug labels
• Do not modify code functionality
• Do not impact contract logic
• Used only in test environment

Additional context

These changes improve debugging by making contract labels clearer and eliminating confusion between proxies and their implementations.

Metadata

• Fixes Fix labelling of addresses in Setup.sol #13391