Analytics: Extend `ide_configuration_changed` analytics event with `location` (e.g. dashboard, preferences, workspace start)

[loujaybee]

Previously, IDE configurations were only made via the /preferences page. However, with the introduction of changes to add IDE preferences for onboarding users #9432 and #9663, the IDE preferences will be seen in three locations:

1. Workspace start (e.g. a path with a context URL /#https://github.com/person/project
2. Dashboard, currently on the workspaces list page
3. Preferences page (/preferences) as before

Proposal

Implement property location with the following values: workspace_list, workspace_start and preferences and extend the existing ide_configuration_changed event. These properties would be passed for each occurrence of the IDE preferences throughout the application.

Relates to this PR: #9663 as part of the epic #6707