Implement JetBrains Toolbox based IDE connections count

[matifali]

Problem Description

JetBrains Toolbox-based remote connections are set to be released soon. While Coder currently tracks JetBrains Gateway usage, we need to implement tracking specifically for Toolbox-based remote connections to provide deployment admins with valuable insights into their adoption and usage patterns.

Implementation Requirements

• Identify a unique method to track Toolbox-based remote connections.
• Integrate this tracking into the existing usage metrics of the IDE.

Related Issues:

• Report Zed IDE usage count coder#16895
• API: /api/v2/deployment/stats does not return count for JetBrains Gateway sessions coder#9673

[matifali]

Initially, we can add the toolbox usage count to the existing JetBrain usage. Later, we can track it separately. This issue talks about the later stage.

[matifali]

As Toolbox uses the same backend as the gateway, we are already counting it as JetBrains usage.
@fioan89 to confirm.

It would be tricky to find a unique way to detect Toolbox usage.

Maybe we can check if toolboxcli exists in the workspace.