No way to disable SSL for Mongo BI auth enabled instance: support non cleartext auth plugins

**Describe the bug**
I start MongoBI connector with --sslMode = disabled (mongosqld cannot accept connections secured using TLS/SSL)

But Cube is always request with SSL causing this error "handshake error: ERROR 1759 (HY000): ssl is required when using cleartext authentication"

**To Reproduce**
Steps to reproduce the behavior:
1. Start mongosqld with --sslMode = disabled
2. Start Cube with npm run dev
3. Hit browser with http://localhost:4000/#/schema
4. See error

**Expected behavior**
Can load the schema

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Version:**
"@cubejs-backend/server@0.10.54"

**Additional context**
Add any other context about the problem here.