[TASK] Exclude StringClassNameToClassConstantRector in rector.yml

As the StringClassNameToClassConstantRector would convert
string class names that are deliberately defined as string,
this rector has been disabled.

Releases: master
Resolves: #89899
Change-Id: Iecbcf2c009885501b0caafe66cb8f5703688c188
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62581
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>

rector.yml

@@ -1,11 +1,3 @@
-services:
-  # php55
-  Rector\Php55\Rector\String_\StringClassNameToClassConstantRector:
-    $classesToSkip:
-      - Error
-      - Locale
-      - mysqli
-
 parameters:
   php_version_features: '7.2'
   auto_import_names: false
@@ -21,7 +13,9 @@ parameters:
       - 'typo3/sysext/install/Tests/Unit/ExtensionScanner/Php/Matcher/Fixtures/PropertyExistsStaticMatcherFixture.php'
       - 'ClassAliasMap.php'
       - 'class.ext_update.php'
+  exclude_rectors:
+    - Rector\Php55\Rector\String_\StringClassNameToClassConstantRector
   sets:
     - 'php53'
     - 'php54'
-#    - 'php55' # disabled and configured manually via services.
+    - 'php55'