Cannot use Connector with SQL Server if SSL is enforced

## Bug Description

I guess this should be considered a bug. I know that we do not need to enforce SSL when using a Connector, since it handles secure connection for us. However, on the other hand, with PostgreSQL and MySQL, we can use Connector even when SSL is enforced, so this makes SQL Server an exception where it doesn't work.

I know that Connector returns tedious options with `encrypt: false` so that connection is not double-encrypted. But perhaps there should be a way for `tedious` to know that we are already passing secure connection.

## Example code

```ts
import { AuthTypes, Connector, IpAddressTypes } from '@google-cloud/cloud-sql-connector'
import knex from 'knex'

const clientOpts = await connector.getTediousOptions({
instanceConnectionName: 'my-project.my-region.my-instance',
ipType: IpAddressTypes.PUBLIC,
authType: AuthTypes.PASSWORD,
})

const database = knex({
client: 'mssql',
connection: {
server: '0.0.0.0', # dummy value due to a bug
user: 'user',
password: 'password',
database: 'database',
options: {
...clientOpts,
},
}
})

const result = await database.first(database.raw(`'True' AS connected`))
```

## Stacktrace

```
ConnectionError: Server requires encryption, set 'encrypt' config option to true.
at /project/node_modules/tedious/src/connection.ts:3251:34
at processTicksAndRejections (node:internal/process/task_queues:95:5) {
code: 'EENCRYPT',
isTransient: undefined
}
```

## How to reproduce

1. Create Cloud SQL Server instance.
2. Check "Allow only SSL connections" checkbox.
3. Connect using above example.

#### Environment details

- OS: MacOS 11.6
- Node.js version: v18.18.0
- npm version: v9.8.1
- connector version: 1.0.0
- tedious version: 16.4.0