[javascript] WEB-72084 Migrate language injectors to the new MultiHostRegistrar API.

GitOrigin-RevId: 54845e3d3ca8ab14442284c782f48ee7f6439694

Author: piotrtomiak

src/main/com/intellij/lang/jsgraphql/ide/injection/GraphQLInjectionUtils.kt

@@ -1,6 +1,7 @@
 package com.intellij.lang.jsgraphql.ide.injection
 
 import com.intellij.lang.Language
+import com.intellij.lang.injection.MultiHostRegistrar
 import com.intellij.lang.jsgraphql.GraphQLLanguage
 import com.intellij.openapi.util.Key
 import com.intellij.psi.PsiElement
@@ -15,8 +16,8 @@ object GraphQLInjectionUtils {
   internal const val GRAPHQL_EXTERNAL_FRAGMENT: String = "EXTERNAL_FRAGMENT"
 
   @JvmStatic
-  fun registerInjection(host: PsiLanguageInjectionHost, language: Language) {
-    InjectedLanguageUtil.getCachedInjectedFileWithLanguage(host, language)?.putUserData(GRAPHQL_INJECTION_KEY, true)
+  fun registerInjection(registrar: MultiHostRegistrar) {
+    registrar.putInjectedFileUserData(GRAPHQL_INJECTION_KEY, true)
   }
 
   @JvmStatic

src/main/com/intellij/lang/jsgraphql/javascript/injection/GraphQLJavaScriptLanguageInjector.kt

@@ -32,16 +32,14 @@ class GraphQLJavaScriptLanguageInjector : MultiHostInjector {
     for (fragment in fragments) {
       registrar.addPlace(fragment.prefix, fragment.suffix, context, fragment.range)
     }
-    registrar.doneInjecting()
-
     if (fragments.size > 1) {
-      StringInterpolationErrorFilter.register(context, injectionLanguage)
-      GraphQLInjectionUtils.registerInjection(context, injectionLanguage)
+      GraphQLInjectionUtils.registerInjection(registrar)
+      StringInterpolationErrorFilter.register(registrar)
     }
-
     if (Registry.`is`("graphql.reformat.injections.javascript")) {
-      JSFormattableInjectionUtil.setReformattableInjection(context, injectionLanguage)
+      JSFormattableInjectionUtil.setReformattableInjection(context, registrar)
     }
+    registrar.doneInjecting()
   }
 
   override fun elementsToInjectIn(): List<Class<out PsiElement>> = INJECTED_ELEMENTS