Move PluginLicenseUtil to CE so it can be used via vault/sdk module (hashicorp#9371) (hashicorp#9381)

Author: hc-github-team-secure-vault-core

sdk/logical/system_view.go

@@ -319,3 +319,14 @@ func (d StaticSystemView) DeregisterRotationJob(_ context.Context, _ *rotation.R
 func (d StaticSystemView) DownloadExtractVerifyPlugin(_ context.Context, _ *pluginutil.PluginRunner) error {
 	return errors.New("DownloadExtractVerifyPlugin is not implemented in StaticSystemView")
 }
+
+// PluginLicenseUtil defines the functions needed to request License and PluginEnv
+// by the plugin licensing under github.com/hashicorp/vault-licensing
+// This only should be used by the plugin to get the license and plugin environment
+type PluginLicenseUtil interface {
+	// License returns the raw license of the running Vault instance
+	License() (string, error)
+
+	// PluginEnv returns Vault environment information used by plugins
+	PluginEnv(context.Context) (*PluginEnvironment, error)
+}