Bug: does not ignore own reports creating errors

[fabulousgk]

Describe the bug
If you generate a report, but the report directory already exists, you get errors, and the report files are included in the new run.

To Reproduce
Command and options used to reproduce the behaviour:
Run script twice without deleting coverage-ts dir

Expected behaviour
A clear and concise description of what you expected to happen.
I would expect the existing report files to be overwritten and not included in the report

Screenshots
If it regards the HTML report, you might want to take a few screenshots.

Environment

• Tool version: latest
• OS:macos
• Node version: 20.x
• Browser (if applicable): [e.g. chrome, safari]

Additional context
Add any other context about the problem here.