[Issue] [MFTF] Use AdminExpandCategoryTreeActionGroup for ExpandTree click

[m2-assistant]

This issue is automatically created based on existing pull request: #29133: [MFTF] Use AdminExpandCategoryTreeActionGroup for ExpandTree click

---

This PR use AdminExpandCategoryTreeActionGroup for clicking on ExpandTree
instead
<click selector="{{AdminCategorySidebarTreeSection.expandAll}}" stepKey="clickOnExpandTree"/>
<waitForPageLoad stepKey="waitForCategoryToLoad"/>

[slavvka]

Hi @m2-assistant[bot]. Thank you for your report.
The issue has been fixed in #29133 by @Usik2203 in 2.4-develop branch
Related commit(s):

• 832360991aff67b94a0cdb5f80823f823210bbe2
• b898f66d11977128d4fc7331723e6e1613e76422
• f41b565c77f94c473af2b63a57b52f72ffc162f4

The fix will be available with the upcoming 2.4.1 release.