[FEATURE] Add support for custom HTTP SSL Certificate for Elastic

[DoKoB0512]

Describe the feature you'd like
We are using the elasticsearch inside a docker-container where it's generating it own's SSL certificate. The flowise cannot connect the Elastic due to the SSL Certificate issue. It would be really nice if we can add an option to use our own SSL Certificate (Optional property) when trying to connect to Elasticsearch.

[HenryHengZJ]

we can add a Additional Configuration similar to Postgres vector DB. Users can specify any additional config like SSL into the JSON object, will that works? Downside is that you have to copy paste the whole cert here

[DoKoB0512]

Either that or you can add a specific field to upload custom SSL certificate that can be used just for elastic.