Fix (UI) - Text area fields alignment

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• 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 !42921
• Here is a brief description of what this PR does

In form rendering, text area fields are not aligned correctly.

• Removed label_class : "" and input_class: "" — these empty strings were overriding the default values (col-xxl-5 / col-xxl-7) of the horizontalField macro, breaking the alignment
• Removed align_label_right: false — the rich text label was no longer aligned to the right like the other fields
• Added label_class: col-xxl-2 and input_class: col-xxl-10 — this exactly matches the style that GLPI core uses for its own rich text fields (e.g., “Description” in project tasks), with a narrow label to maximize editor space.

Screenshots (if appropriate):

Before :

After :

[stonebuzz]

CAn you check from other UI (Ticket, Dropdown, User) which have different layout

[RomainLvr]

CAn you check from other UI (Ticket, Dropdown, User) which have different layout

That looks good

[stonebuzz]

Not from User ;)