Description

Removing the ipAddress field since it is not an input for Cloud SQL SQL Server source.

Kept the variable in Source's config but removed this variable from everywhere else in the code. This will PREVENT a breaking change since the validator won't flag it as an "extra field".

Will have to update the following as well:
(1) Cloud docs https://cloud.google.com/sql/docs/sqlserver/pre-built-tools-with-mcp-toolbox
(2) gemini-cli-extensions https://github.com/gemini-cli-extensions/cloud-sql-sqlserver

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🛠️ Fixes #1549