Proposed changes

Add the --gitignore option to LINTER_COMMANDS_ARRAY_JSCPD when
IGNORE_GITIGNORED_FILES=true. Users can also set the gitignore options
in the Jscpd configuration file, but with this change we make Jscpd
automatically respecting that.

Readiness checklist

In order to have this pull request merged, complete the following tasks.

Pull request author tasks

• I checked that all workflows return a success.
• I included all the needed documentation for this change.
• I provided the necessary tests.
• I squashed all the commits into a single commit.
• I followed the Conventional Commit v1.0.0 spec.
• I wrote the necessary upgrade instructions in the upgrade guide.
• If this pull request is about and existing issue,
  I added the Fix #ISSUE_NUMBER or Close #ISSUE_NUMBER text to the description of the pull request.

Super-linter maintainer tasks

• Label as breaking if this change breaks compatibility with the previous released version.
• Label as either: automation, bug, documentation, enhancement, infrastructure.
• Add the pull request to a milestone, eventually creating one, that matches with the version that release-please proposes.