Display confidential addresses for outputs

[miketlk]

Summary

Display confidential addresses for outputs. The logic for address display is simple: when an output has PSBT_ELEMENTS_OUT_BLINDING_PUBKEY, its address is displayed as confidential. Otherwise, it's displayed as unconfidential.

Changes

• In signing workflow, outputs having blinding pubkey are displayed with confidential address
• get_script_callback() from get_wallet_address.c refactored into globally available get_wallet_script_callback()

Testing

Tests in tests_liquid are being updated with new snapshots having confidential addresses.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Flag	Coverage Δ
unittests	82.26% <ø> (-0.01%)	⬇️

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see 2 files with indirect coverage changes

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