feat: Export to language connect and telemetry VSCODE-318, VSCODE-322

[alenakhineika]

Description

• VSCODE-322 Users should be able to benefit from the Export to language feature even if they are not connected to a cluster. Some languages might use details from the active connection to build a connection string and use it inside driver syntax, use a placeholder string in such cases.
• VSCODE-318 Add telemetry to understand the success of Export to language in VSCode.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[addaleax]

Why didn’t we need this before? I’m sure there is a reason, it’s just not obvious to me :)

[alenakhineika]

Because before we didn't support export to language for a disconnected state. And now we just use this string as default and database and collection placeholders, so users can still get exported results and then replace it with whatever they want. And for the connected state, there was always a real URL from the current connection.