use bitnami legacy etcd

[tb51cx]

Current Behavior

On August 28, 2025, Bitnami abandoned Docker images based on Debian. The image 3.5.7-debian-11-r14 is no longer valid, and once the EKS node is updated, the nodes in the production environment will not work.

2025 年 8 月 28 日，Bitnami 弃用了基于 Debian 的 Docker 镜像。etcd:3.5.7-debian-11-r14这个镜像已经失效,生产环境中的node一旦更新APISIX将不能工作。

Expected Behavior

If there is currently no good solution, is there a compressed file for the image 'etcd: 3.5.7-debian-11-r14' that can provide a smooth transition temporarily, so as not to have the risk of complete unavailability.

如果暂时没有好的方案，是否有etcd:3.5.7-debian-11-r14这个镜像的压缩包提供一下，能暂时平滑过渡一下，不至于有完全不可用的风险。

Error Logs

暂无

Steps to Reproduce

When installing the EKS cluster with APISIX gateway, the node update may fail due to the lack of ETCD image cache.
安装APISIX网关的EKS集群，node节点更新时因为没有ETCD的镜像缓存，重新拉取会失败。

Environment

• APISIX version (run apisix version):
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[juzhiyuan]

Refer to #12663 (comment)