* feat(web): add token and database uri validations to sql server configure
* feat: add sql server address validation
* test: update example sql server URIs
* Update lib/web/databases_test.go
Co-authored-by: STeve (Xin) Huang <xin.huang@goteleport.com>
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Co-authored-by: STeve (Xin) Huang <xin.huang@goteleport.com>