Remove insights (#23952)

* removed server side

* Updated store layer

* unused import

* Updated autogenerated code template

* Updated tests

* lint fix

* unused translations

* webapp side

* Updated i18n

* lint fix:

* type fix

* Updated snapshots

* Removed insights from API specs

* updated e2e

* Updated e2e tests

* Updated e2e tests

* Removed insights tests

* Removed Insights as possible channel to load in sidebar from test

* Removed more insights tests

* More e2e fixed

* More cleanup

* Lint

* More cleanup in client4 and boards api

* More cleanup

* Fixes

* lint fix

---------

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

e2e-tests/cypress/tests/integration/channels/accessibility/accessibility_sidebar_spec.ts

@@ -76,9 +76,6 @@ describe('Verify Accessibility Support in Channel Sidebar Navigation', () => {
         cy.findByRole('button', {name: 'Find Channels'}).should('be.focused');
         cy.focused().tab();
 
-        // * Verify if Insights has focus
-        cy.focused().should('have.text', 'Insights').tab();
-
         // * Verify if focus changes to different channels in Unread section
         cy.get('.SidebarChannel.unread').each((el) => {
             cy.wrap(el).find('.unread-title').should('be.focused');
@@ -99,7 +96,7 @@ describe('Verify Accessibility Support in Channel Sidebar Navigation', () => {
 
     it('MM-T1473 Verify Tab Support in Unreads section', () => {
         // # Press tab from the Main Menu button
-        cy.uiGetLHSAddChannelButton().focus().tab().tab().tab();
+        cy.uiGetLHSAddChannelButton().focus().tab().tab();
 
         // * Verify if focus changes to different channels in Unread section
         cy.get('.SidebarChannel.unread').each((el) => {
@@ -114,7 +111,7 @@ describe('Verify Accessibility Support in Channel Sidebar Navigation', () => {
         markAsFavorite(testChannel.name);
 
         // # Press tab from the add channel button down to all unread channels
-        cy.uiGetLHSAddChannelButton().focus().tab().tab().tab();
+        cy.uiGetLHSAddChannelButton().focus().tab().tab();
         cy.get('.SidebarChannel.unread').each(() => {
             cy.focused().tab().tab();
         });