fix(tests): keep incident selected after findIncidentWithAlert succeeds

searchForAlertInIncidentByFilter unconditionally cleared all filters
after checking each incident, including the one where the alert was
found. This deselected the incident before callers could inspect its
alert details, causing 80s timeouts on incidents-details-table.

Only clear filters when moving to the next incident (alert not found).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: DavidRajnoha

web/cypress/views/incidents-page.ts

@@ -946,8 +946,10 @@ export const incidentsPage = {
       .scrollIntoView()
       .then(() => incidentsPage.searchAllComponentsInIncident(alertName, 0))
       .then((found: boolean) => {
-        incidentsPage.clearAllFilters();
-        cy.wait(500, _qLog());
+        if (!found) {
+          incidentsPage.clearAllFilters();
+          cy.wait(500, _qLog());
+        }
         return cy.wrap(found, _qLog());
       });
   },