fix: add accessors for all fields in the CooperativeWithdrawalInfo

[Rajil1213]

Description

This PR adds accessors for the fields inside the CooperativeWithdrawalInfo struct which are now necessary to be exposed.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor
• New or updated tests

Checklist

• I have performed a self-review of my code.
• I have commented my code where necessary.
• I have updated the documentation if needed.
• My changes do not introduce new warnings.
• I have added tests that prove my changes are effective or that my feature works.
• New and existing tests pass with my changes.

[storopoli]

ACK 96369d9