codecov percentage fails for acceptance test changes

[phil-davis]

When we make "significant" refactorings or additions to the acceptance tests then we sometimes fail the project codecov by 0.01% - probably this is because we have added to the "total amount of code in the project" but have not increased the coverage visible to PHPunit.

Investigate what PHPunit codecov is including when it calculates "total amount of code in the project" and exclude test-only code from that.

[ownclouders]

GitMate.io thinks possibly related issues are #31579 (test), #22492 (test), #22485 (test), #32764 (Improve acceptance tests status fail messages), and #32769 (Make targets for acceptance tests).

[PVince81]

without being able to look at the reports we won't be able to easily fix this. deferred

[phil-davis]

Cleared myself from assignment since it is no currently practical to investigate. See comment above.