[MM-55285]: Screen reader speaking wrong item in list in Find Channels modal (#29552)

* [MA-11]: Fix Screen reader speaking wrong item in list in Find Channels modal

* [MA-11]: Update types across files

* [MA-11]: Minor refactoring

* [MA-11]: Fix e2e test

* [MA-11]: Fix E2E tests

* [MA-11]: Update role and id

* [MA-11]: Fix playwright tests

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

e2e-tests/playwright/support/ui/components/channels/find_channels_modal.ts

@@ -11,7 +11,7 @@ export default class FindChannelsModal {
     constructor(container: Locator) {
         this.container = container;
 
-        this.input = container.getByRole('textbox', {name: 'quick switch input'});
+        this.input = container.getByRole('combobox', {name: 'quick switch input'});
         this.searchList = container.locator('.suggestion-list__item');
     }