Make more mockable classes non-@internal

src/Psalm/Internal/PluginManager/ComposerLock.php

@@ -3,9 +3,6 @@ namespace Psalm\Internal\PluginManager;
 
 use RuntimeException;
 
-/**
- * @internal
- */
 class ComposerLock
 {
     /** @var string */

src/Psalm/Internal/PluginManager/ConfigFile.php

@@ -5,9 +5,6 @@ use Psalm\Config;
 use DomDocument;
 use RuntimeException;
 
-/**
- * @internal
- */
 class ConfigFile
 {
     const NS = 'https://getpsalm.org/schema/config';

src/Psalm/Internal/PluginManager/PluginList.php

@@ -1,9 +1,6 @@
 <?php
 namespace Psalm\Internal\PluginManager;
 
-/**
- * @internal
- */
 class PluginList
 {
     /** @var ConfigFile */

src/Psalm/Internal/PluginManager/PluginListFactory.php

@@ -1,9 +1,6 @@
 <?php
 namespace Psalm\Internal\PluginManager;
 
-/**
- * @internal
- */
 class PluginListFactory
 {
     public function __invoke(string $current_dir, string $config_file_path = null): PluginList