[Gradle] Implement IdeMultiplatformImport using new IdeaKotlinClasspath

^KT-55492 Verification Pending

libraries/tools/kotlin-gradle-plugin-idea/api/kotlin-gradle-plugin-idea.api

@@ -335,6 +335,7 @@ public final class org/jetbrains/kotlin/gradle/idea/tcs/IdeaKotlinClasspath : ja
 	public fun add (Ljava/io/File;)Z
 	public synthetic fun add (Ljava/lang/Object;)Z
 	public fun addAll (Ljava/util/Collection;)Z
+	public final fun addAll (Lorg/jetbrains/kotlin/gradle/idea/tcs/IdeaKotlinClasspath;)Z
 	public fun clear ()V
 	public fun contains (Ljava/io/File;)Z
 	public final fun contains (Ljava/lang/Object;)Z

libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/idea/tcs/IdeaKotlinClasspath.kt

@@ -23,6 +23,10 @@ class IdeaKotlinClasspath private constructor(private val files: MutableSet<File
         return files.add(normalise(element))
     }
 
+    fun addAll(classpath: IdeaKotlinClasspath): Boolean {
+        return files.addAll(classpath.files)
+    }
+
     override fun addAll(elements: Collection<File>): Boolean {
         return files.addAll(elements.map(::normalise))
     }

libraries/tools/kotlin-gradle-plugin-idea/src/main/kotlin/org/jetbrains/kotlin/gradle/idea/tcs/IdeaKotlinDependencyCoordinates.kt

@@ -25,7 +25,6 @@ data class IdeaKotlinBinaryCoordinates(
     }
 }
 
-@IdeaKotlinModel
 data class IdeaKotlinProjectCoordinates(
     val buildId: String,
     val projectPath: String,