[tools] Implement lorisInstance in tools directory

[victori444]

Brief summary of changes

• Implements lorisInstance in detect_conflicts.php

• Resolves other errors found in detect_conflicts.php & fix_candidate_age.php (accessing $commentIDs as an array & querying Test_name)

• [ ] Have you updated related documentation?

Testing instructions (if applicable)

1. Run each of the scripts below and verify that no errors are thrown

• delete_ignored_conflicts.php
• detect_conflicts.php
• lorisform_parser.php
• lorisform_parser.php
• score_instrument.php

Link(s) to related issue(s)

• Resolves #8058 (Reference the issue this fixes, if any.)