IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part

[GrabowskiM]

Question	Answer
JIRA issue	IBX-1689
Type	improvement
Target Ibexa version	v4.0
BC breaks	yes

Changed all eZ/ez- frontend classes/variables to ibexa

Related PRs:

• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part admin-ui#111
• https://github.com/ibexa/calendar/pull/15
• https://github.com/ibexa/commerce-admin-ui/pull/23
• https://github.com/ibexa/commerce-base-design/pull/11
• https://github.com/ibexa/commerce-checkout/pull/10
• https://github.com/ibexa/commerce-fieldtypes/pull/11
• https://github.com/ibexa/commerce-page-builder/pull/11
• https://github.com/ibexa/commerce-price-engine/pull/9
• https://github.com/ibexa/commerce-shop/pull/30
• https://github.com/ibexa/commerce-shop-ui/pull/9
• https://github.com/ibexa/commerce-transaction/pull/17
• https://github.com/ibexa/connector-dam/pull/10
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part content-forms#11
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part core#38
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part #8
• https://github.com/ibexa/fieldtype-page/pull/20
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part fieldtype-query#7
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part fieldtype-richtext#8
• https://github.com/ibexa/form-builder/pull/23
• https://github.com/ibexa/image-editor/pull/47
• https://github.com/ibexa/page-builder/pull/44
• https://github.com/ibexa/personalization/pull/23
• https://github.com/ibexa/product-catalog/pull/220
• https://github.com/ibexa/scheduler/pull/28
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part search#7
• https://github.com/ibexa/segmentation/pull/12
• https://github.com/ibexa/site-factory/pull/13
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part system-info#11
• https://github.com/ibexa/taxonomy/pull/9
• https://github.com/ibexa/tree-builder/pull/35
• IBX-1689: Change all ez- classes/IDs and eZ variables in frontend part user#13
• https://github.com/ibexa/version-comparison/pull/14
• https://github.com/ibexa/workflow/pull/23

Checklist:

• Provided PR description.
• Tested the solution manually.
• Checked that target branch is set correctly (main for features, the oldest supported for bugs).
• Asked for a review (ping @ibexa/engineering).