ci(installer): Force a retry for the \new-e2e-installer\ job (#35115)

Author: chouetz

.gitlab/e2e/e2e.yml

@@ -530,6 +530,7 @@ new-e2e-installer:
     TEAM: fleet
     FLEET_INSTALL_METHOD: "install_script"
     E2E_LOGS_PROCESSING_TEST_DEPTH: 2
+  retry: 1  # Force retry on this specific job to limit flakiness
 
 new-e2e-installer-windows:
   extends: .new_e2e_template
@@ -593,6 +594,7 @@ new-e2e-installer-ansible:
     TARGETS: ./tests/installer/unix
     TEAM: fleet
     FLEET_INSTALL_METHOD: "ansible"
+  retry: 1  # Force retry on this specific job to limit flakiness
 
 new-e2e-ndm-netflow:
   extends: .new_e2e_template