fix: remove share avatar click handler in files table

[JammingBen]

We decided to remove the click handler because it just opened the right sidebar for, which is not really a connected to the share avatars.

fixes #1329

[Copilot]

Pull Request Overview

This PR removes the click handler functionality from share avatars in the files table. The click handler previously opened the right sidebar when users clicked on share avatars, but this functionality was deemed unconnected to the actual purpose of the share avatars.

• Removed click handlers from both "sharedBy" and "sharedWith" avatar components
• Deleted the openSharingSidebar method that was handling the click events
• Updated test selectors to use data-testid attributes instead of CSS classes

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/web-pkg/src/components/FilesList/ResourceTable.vue	Removed oc-button wrappers and openSharingSidebar method from share avatar components
packages/web-pkg/tests/unit/components/FilesList/ResourceTable.spec.ts	Updated test selectors to use data-testid instead of CSS class selectors

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