gradle.kts: improve service initializtion

- prevent analyzing .gradle.kts files until all services are loaded
- remove services caches where it is not required
- replace cached services with cache only during vfs events batch processing
- prevent services loading in actions updating

plugins/scripting/scripting-compiler-impl/src/org/jetbrains/kotlin/scripting/definitions/KotlinScriptDefinitionProvider.kt

@@ -26,6 +26,9 @@ interface ScriptDefinitionProvider {
     companion object {
         fun getInstance(project: Project): ScriptDefinitionProvider? =
             ServiceManager.getService(project, ScriptDefinitionProvider::class.java)
+
+        fun getServiceIfCreated(project: Project): ScriptDefinitionProvider? =
+            ServiceManager.getServiceIfCreated(project, ScriptDefinitionProvider::class.java)
     }
 }