[tools] Refactor recreate_conflicts.php to use getInstrumentNamesList()

[ay-bh]

Brief summary of changes

Refactored recreate_conflicts.php to replace the deprecated Utility::getAllInstruments() function with NDB_BVL_Instrument::getInstrumentNamesList($lorisInstance)

Testing instructions (if applicable)

1. Navigate to /var/www/loris/tools.
2. Run the script with the command php recreate_conflicts.php all.
3. Verify that the script runs without the deprecation error and correctly retrieves all instrument names.

Link(s) to related issue(s)

• Resolves Deprecated LORIS function call in recreate_conflicts.php script #9267

[racostas]

LGTM.

[racostas]

@ridz1208 , @driusan, this one looks good to me. I think could be valuable for loris 26 if we have time yet.
I leave the final review/approval to you.

@ay-bh is one of our new GSoC student (tagging @christinerogers). This it his first PR to our repo. Next time he will make the PR from a different branch that main (it is my fault here since I forgot to mention this convention to him).

Thanks.