test: reduce Go test timeout to 80m to stay below 90m ADO job limit (#8395)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: r2k1

.pipelines/scripts/e2e_run.sh

@@ -38,7 +38,7 @@ E2E_SUBSCRIPTION_ID="${E2E_SUBSCRIPTION_ID:-}"
 ENABLE_SECURE_TLS_BOOTSTRAPPING="${ENABLE_SECURE_TLS_BOOTSTRAPPING:-true}"
 TAGS_TO_SKIP="${TAGS_TO_SKIP:-}"
 TAGS_TO_RUN="${TAGS_TO_RUN:-}"
-E2E_GO_TEST_TIMEOUT="${E2E_GO_TEST_TIMEOUT:-90m}"
+E2E_GO_TEST_TIMEOUT="${E2E_GO_TEST_TIMEOUT:-80m}"
 GALLERY_NAME="${GALLERY_NAME:-}"
 SIG_GALLERY_NAME="${SIG_GALLERY_NAME:-}"