[TEST] Skip go_deps modcache restore for AIX cross builds

Testing whether the cross_build_trace_agent-binary_aix_ppc64 TOC
overflow (0x594f8 > 0x10000) is caused by a stale/mismatched go_deps
modcache artifact, by forcing a fresh `go mod download` instead. Not
meant to be merged.

Author: pgimalac

.gitlab/build/binary_build/aix_cross.yml

@@ -10,15 +10,16 @@
     - when: on_success
   image: registry.ddbuild.io/ci/datadog-agent-buildimages/linux$CI_IMAGE_LINUX_SUFFIX:$CI_IMAGE_LINUX
   tags: ["arch:amd64", "specific:true"]
-  needs: ["go_deps"]
   variables:
     GOOS: aix
     GOARCH: ppc64
     KUBERNETES_MEMORY_REQUEST: "16Gi"
     KUBERNETES_MEMORY_LIMIT: "16Gi"
     KUBERNETES_CPU_REQUEST: 6
   before_script:
-    - !reference [.retrieve_linux_go_deps]
+    - !reference [.sanitize_goproxy]
+    # [TEST] intentionally not restoring the go_deps modcache here - see if a
+    # fresh `go mod download` changes the AIX TOC overflow outcome.
     # Workaround for a Go linker bug: cmd/link/internal/ld/lib.go hardcodes
     # "/lib/crt0_64.o" path instead of resolving it through the compiler
     # Fix upstream: https://go-review.googlesource.com/c/go/+/800880