Update shadow plugin 6.1.0 -> 7.1.1

Version 7.1.1 is absent in jcenter, so additional repository was added
in some modules.

Leave old version in NewMultiplatformIT.kt because of
`This version of Shadow supports Gradle 7.0+ only. Please upgrade.` error.

^KTI-733 Fixed

libraries/reflect/build.gradle.kts

@@ -65,6 +65,8 @@ class KotlinModuleShadowTransformer(private val logger: Logger) : Transformer {
     private data class Entry(val path: String, val bytes: ByteArray)
     private val data = mutableListOf<Entry>()
 
+    override fun getName() = "KotlinModuleShadowTransformer"
+
     override fun canTransformResource(element: FileTreeElement): Boolean =
             element.path.substringAfterLast(".") == KOTLIN_MODULE