Move toRegex extension in kotlin package

libraries/stdlib/src/kotlin/text/regex/RegexExtensions.kt

@@ -16,3 +16,11 @@ public fun String.toRegex(option: RegexOption): Regex = Regex(this, option)
  * Converts the string into a regular expression [Regex] with the specified set of [options].
  */
 public fun String.toRegex(options: Set<RegexOption>): Regex = Regex(this, options)
+
+/**
+ * Converts this [Pattern] to an instance of [Regex].
+ *
+ * Provides the way to use Regex API on the instances of [Pattern].
+ */
+@JvmVersion
+public fun java.util.regex.Pattern.toRegex(): Regex = Regex(this)

libraries/stdlib/src/kotlin/text/regex/RegexJVM.kt

@@ -211,6 +211,8 @@ public class Regex internal constructor(private val nativePattern: Pattern) {
  *
  * Provides the way to use Regex API on the instances of [Pattern].
  */
+@Deprecated("Use extension toRegex instead in kotlin package.")
+@HiddenDeclaration
 public fun Pattern.toRegex(): Regex = Regex(this)