feat: erc20 auth calls

[skosito]

Description

in progress, missing e2e tests

in sync with: zeta-chain/protocol-contracts#401

How Has This Been Tested?

• Tested CCTX in localnet
• Tested in development environment
• Go unit tests
• Go integration tests
• Tested via GitHub Actions

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 24 lines in your changes missing coverage. Please review.

Project coverage is 66.25%. Comparing base (250b90e) to head (1e162cf).

Files with missing lines	Patch %	Lines
pkg/contracts/testdappv2/TestDAppV2.go	0.00%	12 Missing ⚠️
zetaclient/chains/evm/signer/v2_sign.go	0.00%	11 Missing ⚠️
zetaclient/chains/evm/signer/v2_signer.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3012      +/-   ##
===========================================
- Coverage    66.25%   66.25%   -0.01%     
===========================================
  Files          406      406              
  Lines        22772    22773       +1     
===========================================
  Hits         15088    15088              
- Misses        6907     6908       +1     
  Partials       777      777              

Files with missing lines	Coverage Δ
zetaclient/chains/evm/signer/v2_signer.go	0.00% <0.00%> (ø)
zetaclient/chains/evm/signer/v2_sign.go	0.00% <0.00%> (ø)
pkg/contracts/testdappv2/TestDAppV2.go	0.00% <0.00%> (ø)