feat(#1600): add support for list of withdrawals in treasury gov action

[MSzalowski]

List of changes

• add support for a list of withdrawals in treasury gov action

Checklist

• related issue
• [x] My changes generate no new warnings
• [x] My code follows the style guidelines of this project
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the changelog
• [ ] I have added tests that prove my fix is effective or that my feature works

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:white_check_mark: All checks succeeded

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:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

:white_check_mark: All checks succeeded

[github-actions[bot]]

@MSzalowski This PR is in the tag: develop-febc1410ef8e3a12a9ee830cc47a264b54dd2058 , for govtool-metadata-validation service

[github-actions[bot]]

@MSzalowski This PR is in the tag: develop-febc1410ef8e3a12a9ee830cc47a264b54dd2058 , for govtool-backend service

[github-actions[bot]]

@MSzalowski This PR is in the tag: develop-febc1410ef8e3a12a9ee830cc47a264b54dd2058 , for govtool-frontend service