Test: explorer actions and labels

[isidorn]

Refs: #34229 #34218

• Win @mjbvz
• Mac @seanmcbreen
• Linux @sandy081

Complexity: 3

We have refactored the explorer to now support remote file systems. Note that there is a seperate test plan item for remote files. For local files verify the following works as before, both for single folder and multi folder workbench:

• file labels are shown properly (hover, tab area, title are when tabs are swtiched off)
• all the context menu actions work properly in explorer and open editors view
• drag and drop (both inside vscode, and droping a resource from outside of vscode)
• title menu actions in explorer and keyboard actions (rename, delete) work properly
• randomly pick some file actions from the command palette and verify they work