fix(sdk): AttestV2 doesn't support customABI

[alainncls]

What does this PR do?

Adds support for passing a custom ABI to the attestV2 function.
This lets anyone benefit from error decoding on their custom Portal.

Related ticket

Fixes #856

Type of change

• Chore
• Bug fix
• New feature
• Documentation update

Check list

• Unit tests for any smart contract change
• Contracts and functions are documented

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 48.59%. Comparing base (8476c04) to head (6052a5b).

Files with missing lines	Patch %	Lines
sdk/src/dataMapper/PortalDataMapper.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #857   +/-   ##
=======================================
  Coverage   48.59%   48.59%           
=======================================
  Files          18       18           
  Lines         391      391           
  Branches       63       63           
=======================================
  Hits          190      190           
  Misses        198      198           
  Partials        3        3           

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