[No QA] Remove unsafe type assertions from ReportSecondaryActionUtilsTest.ts

[KJ21-ENG]

Explanation of Change

Removed @typescript-eslint/no-unsafe-type-assertion violations from tests/unit/ReportSecondaryActionUtilsTest.ts as part of the cleanup for Expensify/App issue Expensify#94739.

What changed:

• Replaced unsafe Report, Policy, and Transaction assertions with createMock<T>.
• Replaced untyped mock callbacks and any casts with typed mock definitions.
• Used jest.mocked for the isPolicyAdmin mocks.

Why this approach is safe:

• Only test setup and typing changed.
• Existing scenarios, fixtures, and assertions remain unchanged.
• No production behavior is affected.

Reviewer focus:

• Confirm the typed mocks preserve the existing test behavior and accepted argument types.

Fixed Issues

$ Expensify#94739
PROPOSAL: Expensify#94739 (comment)

Count change

Current baseline source:

• config/eslint/eslint.seatbelt.tsv

Before:

• tests/unit/ReportSecondaryActionUtilsTest.ts: 31 violations

After:

• tests/unit/ReportSecondaryActionUtilsTest.ts: 0 violations

Net reduction:

• 31 fewer @typescript-eslint/no-unsafe-type-assertion violations.

TSV evidence:

• The generated TSV was restored byte-for-byte and is not included in this PR.

Tests

1. Run:
   npm run lint -- --show-warnings tests/unit/ReportSecondaryActionUtilsTest.ts
2. Run:
   CI=true npm run lint -- --no-cache --show-warnings tests/unit/ReportSecondaryActionUtilsTest.ts
3. Run:
   npm run test -- tests/unit/ReportSecondaryActionUtilsTest.ts

The focused Jest suite passed all 165 tests. Focused lint, formatting, TSV restoration, and diff hygiene also passed.

Offline tests

Not applicable: this test-only cleanup adds no network behavior.

QA Steps

Not applicable: production behavior and UI are unchanged.

PR Author Checklist

• I linked the correct issue above.
• I included focused testing steps.
• I verified that no production behavior changed.
• I verified that the generated TSV was restored.
• I confirmed that no screenshots are required for this test-only change.

Screenshots/Videos

Not applicable: only a unit-test source file changed.