[AA] Move classIdIfNonLocal to analysis-internal-utils

- The utility will be needed by a `KtFir*Symbol` class.

analysis/analysis-internal-utils/src/psiUtils.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.analysis.utils
+
+import com.intellij.psi.PsiClass
+import com.intellij.psi.PsiClassOwner
+import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.name.FqName
+
+public val PsiClass.classIdIfNonLocal: ClassId?
+    get() {
+        val packageName = (containingFile as? PsiClassOwner)?.packageName ?: return null
+        val qualifiedName = qualifiedName ?: return null
+        val relatedClassName = qualifiedName.removePrefix("$packageName.")
+        if (relatedClassName.isEmpty()) return null
+
+        return ClassId(FqName(packageName), FqName(relatedClassName), false)
+    }