update wdio tests to fit the new actions menu changes #7301
Description
In order for the wdio tests to work, we need to fix how we get the action menu buttons in eform-client/src/app/modules/plugins-management/components/installed/installed-plugins-page
This file eform-client/e2e/Page objects/Plugin.page.ts
needs to follow the samme pattern as in shown in this reference implementation for accessing the actions button of a property https://github.com/microting/eform-backendconfiguration-plugin/blob/master/eform-client/e2e/Page%20objects/BackendConfiguration/BackendConfigurationProperties.page.ts