Remove duplicated es_archive thanks to new cypress task functionality

In elastic#178724, we added the ability to retrieve archives from another
location (namely, where our FTR archives live). This allows me to delete
the duplicated archive specific for the cypress usage, and share the FTR
archive between both. Nice!

x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/event_correlation_rule.cy.ts

@@ -186,11 +186,11 @@ describe('EQL rules', { tags: ['@ess', '@serverless'] }, () => {
 
   describe('with source data requiring EQL overrides', () => {
     before(() => {
-      cy.task('esArchiverLoad', { archiveName: 'no_at_timestamp_field' });
+      cy.task('esArchiverLoad', { archiveName: 'no_at_timestamp_field', type: 'ftr' });
     });
 
     after(() => {
-      cy.task('esArchiverUnload', 'no_at_timestamp_field');
+      cy.task('esArchiverUnload', { archiveName: 'no_at_timestamp_field', type: 'ftr' });
     });
 
     it('includes EQL options in query validation', () => {