ci: allow cold auto-open e2e builds

Author: { "message": "Bad credentials", "documentation_url": "https://docs.github.com/rest", "status": "401"}

scripts/e2e/clone-auto-open-ssh.sh

@@ -35,7 +35,8 @@ CLONE_LOG="$ROOT/clone-auto-open-ssh.log"
 SSH_INVOCATION_LOG="$ROOT/ssh-invocation.log"
 SSH_SESSION_LOG="$ROOT/ssh-session.log"
 RUN_SCRIPT="$ROOT/run-clone-auto-open-ssh.sh"
-CLONE_AUTO_OPEN_TIMEOUT="${DOCKER_GIT_E2E_CLONE_AUTO_OPEN_TIMEOUT:-300s}"
+# Cold controller/project image builds can exceed 5 minutes on GitHub-hosted runners.
+CLONE_AUTO_OPEN_TIMEOUT="${DOCKER_GIT_E2E_CLONE_AUTO_OPEN_TIMEOUT:-900s}"
 FAILURE_DUMPED=0
 
 fail() {