Fix security vulnerability in Path recursive functions #KT-63103

* Prohibit files with name "." or ".."
* Detect cycles caused by files with name "/"
* Prohibit copy outside the target directory

The commit also moves zip-related tests to PathRecursiveFunctionsZipTest.

libraries/stdlib/jdk7/test/PathRecursiveFunctionsTest.kt

@@ -5,10 +5,7 @@
 
 package kotlin.jdk7.test
 
-import java.net.URI
 import java.nio.file.*
-import java.util.zip.ZipEntry
-import java.util.zip.ZipOutputStream
 import kotlin.io.path.*
 import kotlin.jdk7.test.PathTreeWalkTest.Companion.createTestFiles
 import kotlin.jdk7.test.PathTreeWalkTest.Companion.referenceFilenames
@@ -973,50 +970,4 @@ class PathRecursiveFunctionsTest : AbstractPathTest() {
 
         src.copyToRecursively(dst, followLinks = false, overwrite = true)
     }
-
-    private fun createZipFile(parent: Path, name: String): Path {
-        val zipRoot = parent.resolve(name)
-        ZipOutputStream(zipRoot.outputStream()).use { out ->
-            out.putNextEntry(ZipEntry("directory/file.txt"))
-            out.write("hello".toByteArray())
-            out.closeEntry()
-        }
-        return zipRoot
-    }
-
-    @Test
-    fun zipToDefaultPath() {
-        val root = createTempDirectory().cleanupRecursively()
-        val zipRoot = createZipFile(root, "src.zip")
-        val dst = root.resolve("dst")
-
-        val classLoader: ClassLoader? = null
-        FileSystems.newFileSystem(zipRoot, classLoader).use { zipFs ->
-            val src = zipFs.getPath("/directory")
-
-            src.copyToRecursively(dst, followLinks = false)
-
-            val expected = listOf("", "file.txt")
-            testVisitedFiles(expected, dst.walkIncludeDirectories(), dst)
-            assertEquals("hello", dst.resolve("file.txt").readText())
-        }
-    }
-
-    @Test
-    fun defaultPathToZip() {
-        val root = createTestFiles().cleanupRecursively()
-        val zipRoot = createZipFile(root, "dst.zip")
-        val src = root.resolve("1").also { it.resolve("3/4.txt").writeText("hello") }
-
-        val classLoader: ClassLoader? = null
-        FileSystems.newFileSystem(zipRoot, classLoader).use { zipFs ->
-            val dst = zipFs.getPath("/directory")
-
-            src.copyToRecursively(dst, followLinks = false)
-
-            val expected = listOf("", "2", "3", "3/4.txt", "3/5.txt", "file.txt")
-            testVisitedFiles(expected, dst.walkIncludeDirectories(), dst)
-            assertEquals("hello", zipFs.getPath("/directory/3/4.txt").readText())
-        }
-    }
 }