E2E Tests: unify compose files, support Opensearch (#28716)

* Unify docker-compose files, support opensearch and redis
* Support cypress/playwright bools, MM_SERVICE_OVERRIDES input
* Remove unused directives from E2E tests
* [skip ci] Fix ES tests, PR messages
* [skip ci] Fix service pruning on server restart
* [skip ci] Make services overrides a CSV, better param descriptions

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

e2e-tests/cypress/tests/integration/channels/integrations/integrations_spec.js

@@ -394,6 +394,9 @@ describe('Integrations page', () => {
         // # Enter a request url for custom slash command
         cy.findByLabelText('Request URL').should('exist').scrollIntoView().type('https://example.com');
 
+        // # Enter the desired request method
+        cy.findByLabelText('Request Method').should('exist').scrollIntoView().select('GET');
+
         // # Check the option of autocomplete
         cy.findByLabelText('Autocomplete').should('exist').scrollIntoView().click();