Bump SqlParser to 172.20.0

[mohitagarwal-sql]

Pull Request Template – SQL Tools Service

Description

This PR bumps SqlParser to 172.14.1 to bring in new changes done in SqlParser.
https://www.nuget.org/packages/Microsoft.SqlServer.Management.SqlParser/172.20.0

Code Changes Checklist

• New or updated unit tests added
• All existing tests pass (dotnet test)
• Code follows contributing guidelines
• Logging/telemetry updated if relevant
• No protocol or behavioral regressions

Reviewers: Please read our reviewer guidelines

[github-actions]

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Please respond to this comment verifying that you've done the appropriate validation (or explain why it's not necessary) before merging in the PR

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• Check the source repo for any open issues with the release being updated to (if available)