Add go mod download before egressip make build

openshift-tests-private PR #30082 removed the update-origin
target from the build dependency chain. That target populated
GOMODCACHE with the openshift/origin module before patch-bindata
ran. Without it, patch-bindata tries to chmod a file in the
module cache that has not been downloaded yet, failing with
"No such file or directory" (OCPQUAL-31 side-effect).

Run go mod download explicitly before make build to ensure the
module cache is populated, restoring the previous behaviour.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: tusharjadhav3302

collection/stages/roles/egressip_tests/tasks/run_egressip_tests.yml

@@ -36,6 +36,14 @@
     allowlist_path: "{{ egressip_test_results_dir }}/allowlist.txt"
     tests_to_run_path: "{{ egressip_test_results_dir }}/list_of_tests_to_run.txt"
 
+- name: Download Go module dependencies before build
+  ansible.builtin.shell: |
+    source {{ home_dir }}/.bashrc
+    go mod download
+  args:
+    chdir: "{{ egressip_test_dir }}"
+  changed_when: true
+
 - name: Build extended-platform-tests executable
   ansible.builtin.shell: |
     source {{ home_dir }}/.bashrc