fix(tag): allow multiple item types in massive updates

[rickserrat]

Checklist before requesting a review

• I have performed a self-review of my code.
• I have added tests that prove my fix is effective.
• I have updated the CHANGELOG with a short functional description of the fix.
• This change requires a documentation update.

Description

• Fixes Massive update of associated item types only allows a single value #361 .
• Allows users to select multiple associated item types when updating tags through massive actions.
• Preserves the existing behavior of replacing the current associated item type list.
• Submits the selected item types as an array.
• Adds a regression test covering multiple selected item types.

This issue is separate from #359 and PR #360. Those changes handle scalar values submitted by the existing single-select field, while this pull request changes the massive action field to support multiple selections.

Testing

• Verified that multiple associated item types can be selected.
• Verified that all selected values are stored in type_menu.
• Verified that the selected values are applied to all tags included in the massive action.
• Ran the PHPUnit test suite successfully.

Screenshots

Before

The massive action field only accepts one associated item type.

After

The massive action field accepts multiple associated item types.

[Rom1-B]

Can you rebase to resolve the conflicts
and then fix the lint issues?

[rickserrat]

Can you rebase to resolve the conflicts and then fix the lint issues?

Thanks for the review.

I rebased the branch onto the latest main, resolved the conflicts, removed the unrelated defensive check, and fixed the lint and licence header issues.

The updated branch has been pushed and the workflow is now awaiting approval.