Remove deprecated configuration in the V3

[spacewander]

Description

Let's remove the deprecated configuration in the APISIX v3, including:

• [ ] health_check_retry option https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/cli/etcd.lua#L201
• [ ] lua_shared_dicts https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/cli/ops.lua#L654-L655
• [ ] audience in authz-keycloak https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/plugins/authz-keycloak.lua#L123-L129
• [ ] upstream in mqtt-proxy https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/stream/plugins/mqtt-proxy.lua#L36
• [ ] scheme in proxy-rewrite https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/plugins/proxy-rewrite.lua#L71
• [ ] various apisix.real_ip_xxx options https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/cli/ngx_tpl.lua#L380
• [ ] some configurations in syslog https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/plugins/syslog.lua#L62
• [ ] some configurations in error-log-logger https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/plugins/error-log-logger.lua#L69-L74
• [ ] drop support of service_protocol https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/schema_def.lua#L613
• [ ] move the disable to _meta https://github.com/apache/apisix/blob/2385768cc004ee6ac9f6d50167d2eb671669f3c0/apisix/plugin.lua#L160

---

• [ ] remove old configuration items like port_admin from the configuration file
• [ ] remove the expression to determine whether to run the plugin or not inside some plugins (like fault-injection) since https://github.com/apache/apisix/pull/7453 is merged.

[bzp2010]

Maybe we can remove old configuration items like port_admin from the configuration file as well? 🤔

[spacewander]

Maybe we can remove old configuration items like port_admin from the configuration file as well? 🤔

LGTM

[spacewander]

We can also remove the expression to determine whether to run the plugin or not inside some plugins (like fault-injection) since https://github.com/apache/apisix/pull/7453 is merged.

[spacewander]

@tzssangglass Let's submit PRs to remove them when you have free time. Don't forget to submit PR per task so we can record them in the changelog.