Un-deprecate the ParserPreSaveTransformComplete hook

Although it's true that Parsoid doesn't (yet) support this hook, and
the $parser object referenced in the hook is likely going to be changed,
this is a hook added in 1.35 (eb6c5f70d9)
to replace use of an even worse hook.  So let's keep the lesser of the
evils, at least for now.

Bug: T236809
Change-Id: I8f866c3b9f1fc51848cfe9364635112371d18e3e

RELEASE-NOTES-1.35

@@ -789,9 +789,6 @@ because of Phabricator reports.
         Use BeforeParserFetchTemplateAndTitle
     - ParserSectionCreate
         No replacement; <section> tag wrapping will be done by core in future.
-    - ParserPreSaveTransformComplete
-        No replacement; Content::preSaveTransform() provides for customizable
-        PreSaveTransforms
     - BeforeParserrenderImageGallery
         No replacement; MediaHandler provides for customizable media rendering
     - ParserBeforeTidy

docs/hooks.txt

@@ -2671,7 +2671,7 @@ $parserOutput: The ParserOutput object.
 &$text: The text being transformed, before core transformations are done.
 &$options: The options array being used for the transformation.
 
-'ParserPreSaveTransformComplete': DEPRECATED since 1.35!
+'ParserPreSaveTransformComplete':
 Called from Parser::preSaveTransform() after
 processing is complete, giving the extension a chance to further modify the
 wikitext.

includes/HookContainer/DeprecatedHooks.php

@@ -48,7 +48,6 @@ class DeprecatedHooks {
 		'ParserBeforeTidy' => [ 'deprecatedVersion' => '1.35' ],
 		'ParserFetchTemplate' => [ 'deprecatedVersion' => '1.35' ],
 		'ParserGetVariableValueVarCache' => [ 'deprecatedVersion' => '1.35' ],
-		'ParserPreSaveTransformComplete' => [ 'deprecatedVersion' => '1.35' ],
 		'ParserSectionCreate' => [ 'deprecatedVersion' => '1.35' ],
 		'RevisionInsertComplete' => [ 'deprecatedVersion' => '1.31' ],
 		'UndeleteShowRevision' => [ 'deprecatedVersion' => '1.35' ],

includes/parser/Hook/ParserPreSaveTransformCompleteHook.php

@@ -5,7 +5,7 @@ namespace MediaWiki\Hook;
 use Parser;
 
 /**
- * @deprecated since 1.35
+ * @stable
  * @ingroup Hooks
  */
 interface ParserPreSaveTransformCompleteHook {