Write E2E for MM-T5129 Muted channel should not be listed in the Unread section of the Find Channel modal

[mattermod]

Write Cypress test for MM-T5129 Muted channel should not be listed in the Unread section of the Find Channel modal.

If you need any guidance or need more information please post a message in quality-assurance channel

The following are required:

• Use MM-T5129 as test case id
• See suggested steps here: https://automation-test-cases.vercel.app/test/MM-T5129
• Maintain current Webapp folder structure e.g. e2e/cypress/tests/integration/modals/quick*switcher*spec
• Test description should have the following format "key + name", like below.

it('MM-T623 Lock to this channel on webhook configuration works', () => {...});

• When adding extra steps to the test case use underscore test step number e.g. it('MM-T623_1 test name..., it('MM-T623_2 test name... etc.
• See similar automated tests here - https://github.com/mattermost/mattermost-webapp/blob/master/e2e/cypress/tests/integration/modals/quick*switcher_spec.js

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JIRA: https://mattermost.atlassian.net/browse/MM-46890

[VishakhaPoonia]

I would like to work on this one.