Change default behavior for missing output

[marschattha]

#1466 again with output_missing = "parse" for all linters except eslint and kubelint

[qltysh]

Diff Coverage: The code coverage on the diff in this pull request is 73.5%.

Total Coverage: This PR will not change total coverage.

File Coverage Changes

Path	File Coverage Δ	Indirect
qlty-check/src/executor/invocation_result.rs	0.6

🛟 Help

• Diff Coverage: Coverage for added or modified lines of code (excludes deleted files). Learn more.

• Total Coverage: Coverage for the whole repository, calculated as the sum of all File Coverage. Learn more.

• File Coverage: Covered Lines divided by Covered Lines plus Missed Lines. (Excludes non-executable lines including blank lines and comments.)

  • Indirect Changes: Changes to File Coverage for files that were not modified in this PR. Learn more.

[brynary]

Approving. So these snapshot changes look OK?

[marschattha]

Added snapshot tests for trufflehog and markdownlint for scenarios where there is no output/issues to report.
Not sure if any other plugins behave similarly but these two do so added their tests.