test: fix funding for ProRegTx with external collateral

[UdjinM6]

Issue being fixed or feature implemented

#7455 follow-up

What was done?

How Has This Been Tested?

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

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[thepastaclaw]

🔍 Review in progress — actively reviewing now (commit 2144bf2)

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 621ba5de-90c1-45b8-b38d-ec4edc72095a

📥 Commits

Reviewing files that changed from the base of the PR and between ca2912d and 2144bf2.

📒 Files selected for processing (1)

• src/test/evo_deterministicmns_tests.cpp

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Walkthrough

CreateProRegTxExternalCollateral now funds externally-referenced provider registration transactions with 1 * COIN instead of the full regular collateral amount. The transaction payload and signing flow remain unchanged.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: pastapastapasta, knst

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly reflects the test change to ProRegTx funding with external collateral.
Description check	✅ Passed	The description is related to the ProRegTx funding test fix and issue #7455 follow-up.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[knst]

utACK 2144bf2

[knst]

nit: comment is useless