Updating `tedious` in `mssql` docs sample

[ruyadorno]

In order to get the current mssql-based SQL Server sample working on https://github.com/GoogleCloudPlatform/nodejs-docs-samples/tree/main/cloud-sql/sqlserver/mssql we'll need to make sure mssql is using a newer version of tedious, which supports the connector config property which in turn enable support to the Cloud SQL Node.js Connector.

Once mssql is updated upstream we should be able to update our SQL Server doc sample to start using the Node.js Connector package.

Related to: #140

[ruyadorno]

Update: Opened a PR in mssql to try and start that conversation with their maintainers, there are a few issues at play though, like the fact that the new version of tedious dropped support to node14 which in turn will require a semver-major bump in mssql next release (once that update lands).

Ref: tediousjs/node-mssql#1500

[edosrecki]

@ruyadorno this was just released in mssql v10: https://github.com/tediousjs/node-mssql/releases/tag/v10.0.0

[jackwotherspoon]

Docs samples are now using "mssql": "^11.0.0" (refs)

Should be unblocked to add a connect-connector.js and connect-connector-with-iam-authn.js to nodejs-docs-samples/cloud-sql/sqlserver folder.