Merge pull request #21328 from colemanw/downloadCSV

..._kit/Civi/Api4/Action/SearchDisplay/AbstractRunAction.php

ext/search_kit/Civi/Api4/Action/SearchDisplay/Download.php

...rch_kit/Civi/Api4/Action/SearchDisplay/GetSearchTasks.php

...dmin/resultsTable/crmSearchAdminResultsTable.component.js

...mSearchAdmin/resultsTable/crmSearchAdminResultsTable.html

..._kit/ang/crmSearchDisplayTable/crmSearchDisplayTable.html

...arch_kit/ang/crmSearchTasks/crmSearchTaskDownload.ctrl.js

ext/search_kit/ang/crmSearchTasks/crmSearchTaskDownload.html

...search_kit/ang/crmSearchTasks/crmSearchTasks.component.js

ext/search_kit/ang/crmSearchTasks/crmSearchTasks.html

...tests/phpunit/api/v4/SearchDisplay/SearchDownloadTest.php