EvmAddress not used for account alias when public key is empty

[venilinvasilev]

Description

When an account alias is expected but no public key is provided (e.g.,
empty), EvmAddress is not utilized as the alias representation.

Expected Behavior

If the public key is not provided or empty, the system should support
using EvmAddress as the account alias where applicable.

Actual Behavior

The absence of a public key results in alias handling that does not
consider EvmAddress.

Proposed Solution

Update alias resolution logic to: - Detect empty or missing public key -
Use EvmAddress as the account alias when appropriate

Additional context

This ensures consistent alias behavior with other SDKs and improves interoperability
with EVM-style addressing.