fix(APP-3882): Use correct native token symbol for asset transfer warning

[thekidnamedkd]

Description

Uses the config for supported chains to fetch correct token symbol when warning users about native transfers in a proposal action.

Task: APP-3882

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• Manually smoke tested the functionality locally
• Confirmed there are no new warnings or errors in the browser console
• Made the corresponding changes to the documentation
• Added tests that prove my fix is effective or that my feature works
• Updated the CHANGELOG.md file after the [UPCOMING] title and before the latest version
• (For User Stories only) Double-checked that all Acceptance Criteria are satisified
• Confirmed there are no new warnings on automated tests
• Selected the correct base branch
• Commented the code in hard-to-understand areas
• Followed the code style guidelines of this project
• Reviewed that the files changed in GitHub’s UI reflect my intended changes
• Confirmed the pipeline checks are not failing