## Description
This PR fixes an issue where a potentially malicious user can connect to disallowed hosts from the Elasticsearch plugin within Appsmith. This is because Elasticsearch client SDK is a HTTP interface underneath the hood.
## Type of change
- Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
- Junits for the following:
- create datasource with disallowed host
- validate datasource with disallowed host
- test datasource with disallowed host
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my feature works
- [x] New and existing unit tests pass locally with my changes
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