Add ssl encryption to Elasticsearch

[sotojn]

This PR makes the following changes:

• adds e2e helm tests that test teraslice with an encrypted elasticsearch cluster

TODO:

• Rename some vars and add typdoc to functions
• refactor createValuesYaml()
• Add better error handling and ensure cleanup of generated test values.yaml files
• Refactor createClient to have better logic when provided a cert
• Refactor how we connect to es/os and how we provide username and passwords
• Fix issue of test failing at the end in ssl during teardown
• Add encrypt script to ci pipeline
• Add better logic when generating certs
• remove unnecessary base64 caCert in os2 helm template