Fix - Resolve SQL alias errors and undefined array keys

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes 1.8.8 - Error opening report #293
• Here is a brief description of what this PR does

This PR addresses issues that were causing database errors and PHP warnings:

Issues Fixed:

• SQL Error: Fixed "Unknown column 'glpi_groups_tickets.groups_id'" by correcting table aliases in WHERE clauses
• PHP Warnings: Resolved "Undefined array key" errors for 'export', 'datas', and 'unit' in endGraph method

Screenshots (if appropriate):

[stonebuzz]

@RomainLvr

can you check for #296 (comment)

[stonebuzz]

@RomainLvr

can you check this too
#293