Revert "feat: remove isNewManualExpenseFlowEnabled beta flag"

[jasperhuangg]

Reverts #96228

$ #96593

[melvin-bot]

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[github-actions]

🚧 jasperhuangg has triggered a test Expensify/App build. You can view the workflow run here.

[codecov]

Codecov Report

✅ Changes either increased or maintained existing code coverage, great job!

Files with missing lines	Coverage Δ
src/CONST/index.ts	94.81% <ø> (ø)
...onents/MoneyRequestConfirmationFields/Provider.tsx	100.00% <100.00%> (ø)
...mponents/MoneyRequestConfirmationFields/context.ts	80.00% <ø> (ø)
...onfirmationList/hooks/useConfirmationValidation.ts	83.33% <100.00%> (ø)
...stConfirmationList/hooks/useFormErrorManagement.ts	90.38% <100.00%> (ø)
...eyRequestConfirmationList/sections/AmountField.tsx	43.96% <100.00%> (+0.98%)	⬆️
...oneyRequestConfirmationList/sections/DateField.tsx	78.26% <100.00%> (+19.56%)	⬆️
...uestConfirmationList/sections/DescriptionField.tsx	76.66% <100.00%> (+6.66%)	⬆️
...RequestConfirmationList/sections/MerchantField.tsx	71.73% <100.00%> (+21.73%)	⬆️
.../components/MoneyRequestConfirmationListFooter.tsx	100.00% <100.00%> (ø)
... and 11 more
... and 12 files with indirect coverage changes

[github-actions]

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[jasperhuangg]

Closing as this is a dupe of #96661