fix(GlCollapsibleListbox): remove aria-owns attribute from search

What does this MR do?

As raised in gitlab#436939 (closed) aria-owns on <gl-listbox-search-input> results in out from axe_clean test:

Failures:

  1) Work item for signed in user behaves like work items iteration for accessibility passes axe automated accessibility testing in open state
     Got 1 failure and 1 other error:
     Shared Example Group: "work items iteration" called from ./ee/spec/features/projects/work_items/work_item_spec.rb:22

     1.1) Failure/Error: expect(page).to be_axe_clean.within(work_item_iteration_selector)
          
            Found 1 accessibility violation:
          
            1) aria-valid-attr-value: ARIA attributes must conform to valid values (critical)
                https://dequeuniversity.com/rules/axe/4.8/aria-valid-attr-value?application=axeAPI
                The following 1 node violate this rule:
                
                    Selector: div[aria-owns="listbox-59"]
                    HTML: <div class="gl-listbox-search" aria-owns="listbox-59" data-testid="listbox-search-input">
                    Fix all of the following:
                    - Invalid ARIA attribute value: aria-owns="listbox-59"

Attempted solutions:

• Use aria-controls instead of aria-owns
• Move aria-owns on to the <input> element rather than the wrapping <div>
• Move aria-controls on to the <input> element rather than the wrapping <div>

Screenshots or screen recordings

Integration merge requests

• GitLab: mr_url
• CustomersDot: mr_url
• Status Page: mr_url

Does this MR meet the acceptance criteria?

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Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

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Accessibility

If this MR adds or modifies a component, take a few moments to review the following:

• All actions and functionality can be done with a keyboard.
• Links, buttons, and controls have a visible focus state.
• All content is presented in text or with a text equivalent. For example, alt text for SVG, or aria-label for icons that have meaning or perform actions.
• Changes in a component’s state are announced by a screen reader. For example, changing aria-expanded="false" to aria-expanded="true" when an accordion is expanded.
• Color combinations have sufficient contrast.