[4/4] Reserved token CSV export for v1

[tomquirk]

What does this PR do and why?

As per title.

Screenshots or screen recordings

Acceptance checklist

• [x] I have evaluated the Approval Guidelines for this PR.
• [x] I have tested this PR in all supported browsers.
• [x] I have tested this PR in dark mode and light mode (if applicable).

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[johnnyd-eth]

Should we include the remaining owner % in the export if it exists?

This... ...results in...