* Add universal list collapseAll keybinding

This adds the ability to perform a collapse all on a full tree upon a keyboard shortcut. Upon performing the shortcut, it will collapse every node on the tree.

debt - fs.readlink() can return relative paths, so we use fs.realpath() instead to ensure absolute paths for symbolic links when watching.

microsoft/vscode-remote-release/issues/2 - ignore machine settings in user settings in remote context

Related to #71686

Part of #63723

Fixes #72629

Fixes #47534

Fixes #72146

This reverts commit b513141f.