[code] vscode.extensions validations don't respect extension packs

[akosyakov]

Bug description

Extensions are warned although they are installed via the extension pack:

Steps to reproduce

See above.

Workspace affected

No response

Expected behavior

No response

Example repository

No response

Anything else?

No response

[akosyakov]

cc @jeanp413

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.