These aliases were added in 292713c887
(part of v28.0), but did not deprecate them. They are no longer used
in the CLI itself, but may be used by cli-plugin implementations.
This deprecates the aliases in `cli-plugins/manager` in favor of
their equivalent in `cli-plugins/manager/metadata`:
- `CommandAnnotationPlugin`
- `CommandAnnotationPluginVendor`
- `CommandAnnotationPluginVersion`
- `CommandAnnotationPluginInvalid`
- `CommandAnnotationPluginCommandPath`
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
