[MM-62133] Activate crossteam search by default (#30348)

* activate cross team search by default

* fix e2e test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/cypress/tests/integration/channels/accessibility/accessibility_keyboard_usability_spec.js

@@ -70,6 +70,12 @@ describe('Verify Accessibility keyboard usability across different regions in th
         cy.get('body').type('{leftarrow}').wait(100);
         cy.get('#messagesTab').should('have.class', 'a11y--active a11y--focused');
 
+        // # move focus to the team selector
+        cy.focused().tab();
+
+        // * Ensures the focus item has test-id of searchTeamsSelectorMenuButton
+        cy.get('#searchTeamsSelectorMenuButton').should('have.class', 'a11y--active a11y--focused');
+
         // # move focus to search results items
         cy.focused().tab();
 

server/public/model/feature_flags.go

@@ -82,7 +82,7 @@ func (f *FeatureFlags) SetDefaults() {
 	f.WebSocketEventScope = true
 	f.NotificationMonitoring = true
 	f.ExperimentalAuditSettingsSystemConsoleUI = false
-	f.ExperimentalCrossTeamSearch = false
+	f.ExperimentalCrossTeamSearch = true
 	f.CustomProfileAttributes = false
 }