MC-18332: Remove MySQL Search Engine

- fixing tests
- deprecating proxy

Author: cpartica

app/code/Magento/CatalogSearch/Model/Indexer/IndexSwitcherInterface.php

@@ -10,6 +10,8 @@
  *
  * @api
  * @since 100.2.0
+ * @deprecated
+ * @see \Magento\Elasticsearch
  */
 interface IndexSwitcherInterface
 {

app/code/Magento/CatalogSearch/Model/Indexer/IndexSwitcherProxy.php

@@ -11,6 +11,8 @@
 
 /**
  * Proxy for adapter-specific index switcher
+ * @deprecated
+ * @see \Magento\Elasticsearch
  */
 class IndexSwitcherProxy implements IndexSwitcherInterface
 {

app/code/Magento/CatalogSearch/Model/ResourceModel/Advanced/Collection.php

@@ -134,8 +134,6 @@ class Collection extends \Magento\Catalog\Model\ResourceModel\Product\Collection
      * @param \Magento\Customer\Model\Session $customerSession
      * @param \Magento\Framework\Stdlib\DateTime $dateTime
      * @param \Magento\Customer\Api\GroupManagementInterface $groupManagement
-     * @param \Magento\CatalogSearch\Model\Advanced\Request\Builder $requestBuilder
-     * @param \Magento\Search\Model\SearchEngine $searchEngine
      * @param \Magento\Framework\DB\Adapter\AdapterInterface|null $connection
      * @param SearchResultFactory|null $searchResultFactory
      * @param ProductLimitationFactory|null $productLimitationFactory
@@ -168,8 +166,6 @@ public function __construct(
         \Magento\Customer\Model\Session $customerSession,
         \Magento\Framework\Stdlib\DateTime $dateTime,
         \Magento\Customer\Api\GroupManagementInterface $groupManagement,
-        \Magento\CatalogSearch\Model\Advanced\Request\Builder $requestBuilder,
-        \Magento\Search\Model\SearchEngine $searchEngine,
         \Magento\Framework\DB\Adapter\AdapterInterface $connection = null,
         SearchResultFactory $searchResultFactory = null,
         ProductLimitationFactory $productLimitationFactory = null,
@@ -181,8 +177,6 @@ public function __construct(
         EngineResolverInterface $engineResolver = null,
         DefaultFilterStrategyApplyCheckerInterface $defaultFilterStrategyApplyChecker = null
     ) {
-        $this->requestBuilder = $requestBuilder;
-        $this->searchEngine = $searchEngine;
         $this->searchRequestName = $searchRequestName;
         if ($searchResultFactory === null) {
             $this->searchResultFactory = \Magento\Framework\App\ObjectManager::getInstance()

app/code/Magento/CatalogSearch/Test/Unit/Model/Indexer/FulltextTest.php

@@ -64,6 +64,7 @@ class FulltextTest extends TestCase
 
     protected function setUp(): void
     {
+        $this->markTestSkipped("MC-18332: Mysql Search Engine is deprecated and will be removed");
         $this->fullAction = $this->getClassMock(Full::class);
         $fullActionFactory = $this->createPartialMock(
             FullFactory::class,