Bump stable Kotlin version in KGP IT to 1.9.23

When generating cinterops locally with
kotlin.native.distribution.type=light and Xcode 15.3, cinterop fails due
to the macro expansion issues in libclang from llvm 11.0

^KT-65542
^KT-67826
diff --git a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/TestVersions.kt b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/TestVersions.kt
index 39c43f8..8a37997 100644
--- a/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/TestVersions.kt
+++ b/libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/TestVersions.kt
@@ -38,7 +38,7 @@
     }
 
     object Kotlin {
-        const val STABLE_RELEASE = "1.9.21"
+        const val STABLE_RELEASE = "1.9.23"
         const val MPP_MIN_SUPPORTED = "1.7.21"
 
         // Copied from KOTLIN_VERSION.kt file