cli-plugins/manager: deprecate metadata aliases

These aliases were added in 4321293
(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`:

- `NamePrefix`
- `MetadataSubcommandName`
- `HookSubcommandName`
- `Metadata`
- `ReexecEnvvar`

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

cli-plugins/manager/metadata.go

@@ -6,18 +6,26 @@ import (
 
 const (
 	// NamePrefix is the prefix required on all plugin binary names
+	//
+	// Deprecated: use [metadata.NamePrefix]. This alias will be removed in a future release.
 	NamePrefix = metadata.NamePrefix
 
 	// MetadataSubcommandName is the name of the plugin subcommand
 	// which must be supported by every plugin and returns the
 	// plugin metadata.
+	//
+	// Deprecated: use [metadata.MetadataSubcommandName]. This alias will be removed in a future release.
 	MetadataSubcommandName = metadata.MetadataSubcommandName
 
 	// HookSubcommandName is the name of the plugin subcommand
 	// which must be implemented by plugins declaring support
 	// for hooks in their metadata.
+	//
+	// Deprecated: use [metadata.HookSubcommandName]. This alias will be removed in a future release.
 	HookSubcommandName = metadata.HookSubcommandName
 )
 
 // Metadata provided by the plugin.
+//
+// Deprecated: use [metadata.Metadata]. This alias will be removed in a future release.
 type Metadata = metadata.Metadata