Demote new experimental capitalize overloads in overload resolution

Revert "Fix method reference ambiguity in test after introducing 'capitalize' overload"
This reverts commit fe9bd9ee

compiler/testData/codegen/box/reflection/functions/functionFromStdlib.kt

@@ -7,6 +7,5 @@ import kotlin.reflect.jvm.isAccessible
 fun doStuff(fn: KFunction1<String, String>) = fn.call("oK")
 
 fun box(): String {
-    val method: KFunction1<String, String> = String::capitalize
+    return doStuff(String::capitalize.apply { isAccessible = true })
-    return doStuff(method.apply { isAccessible = true })
 }

libraries/stdlib/jvm/src/kotlin/text/StringsJVM.kt

@@ -574,6 +574,7 @@ public actual fun String.capitalize(): String {
  */
 @SinceKotlin("1.3")
 @ExperimentalStdlibApi
+@kotlin.internal.LowPriorityInOverloadResolution
 public fun String.capitalize(locale: Locale): String {
     if (isNotEmpty()) {
         val firstChar = this[0]
@@ -608,6 +609,7 @@ public actual fun String.decapitalize(): String {
  */
 @SinceKotlin("1.3")
 @ExperimentalStdlibApi
+@kotlin.internal.LowPriorityInOverloadResolution
 public fun String.decapitalize(locale: Locale): String {
     return if (isNotEmpty() && !this[0].isLowerCase()) substring(0, 1).toLowerCase(locale) + substring(1) else this
 }