[FEAT] Allow self-signed certificates in hana-utils

[mikejgray]

Objective

With a configuration option, allow insecure (self-signed certificate) connections to HANA.

Initial Implementation Requirements

• Defaults to false, but is configurable via neon.yaml
• verify=False if the configuration allows for it
• Able to connect to a HANA instance backed by a self-signed certificate, such as the default Neon Hub configuration

Other Considerations

May want to consider if there are other situations where this is valuable

[mikejgray]

Lines 105 and 173 in hana_utils.py are the relevant lines I changed in my local venv to make this work, but a complete implementation would require more work than that