Remove the initialization of FILE_ARRAY_xxx variables because worker.sh
dynamically initializes them already.

sql-lint is unmaintained, and its dependencies are impacted by several
vulnerabilities.

- Remove introductory text from stdout and stderr files.
- Always create stdout and stderr files, not only when there are errors.

Remove an undocumented corner case that might cause Super-linter to
consider a configuration value for a configuration file that points to a
non-existing YAML file as valid. Before this change, Super-linter falls
back to a yml (yaml) extension if the configuration value points to a
non-existing file with a yaml (yml) extension. This workaround dates
back to when Super-linter didn't support customizing configuration file
names.

Now, if the configuration file doesn't exist, Super-linter throws a
fatal error so users can fix their configuration instead.

Reduce the number of processes to 1 if at least one FIX_xxxx variable is
set to true. This avoids that Parallel runs multiple processes that
might edit the same file at the same time.

- CSS, Sass, SCSS
- HTML
- JSON
- JSX
- GraphQL
- Vue
- YAML

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>