Closes #12849

Description:

• When ReprEntry.style == "value" (happens when calling pytest.fail(..., pytrace=False), the message should not be printed to terminal using TerminalWriter._write_source because then it'll try to highlight the message as source code
• The message should be printed to terminal directly using TerminalWriter.line or TerminalWriter.write, I went with the later for testing purposes Fix ANSI escape codes for colored output not handled correctly with pytest.fail(..., pytrace=False) #12959 (comment)

• Include documentation when adding new features.
• Include new tests or update existing tests when applicable.
• Allow maintainers to push and squash when merging my commits. Please uncheck this if you prefer to squash the commits yourself.
• Add text like closes #XYZW to the PR description and/or commits (where XYZW is the issue number). See the github docs for more information.
• Create a new changelog file in the changelog folder, with a name like <ISSUE NUMBER>.<TYPE>.rst. See changelog/README.rst for details.
• Add yourself to AUTHORS in alphabetical order.