[Wasm] stdlib API: make kotlin.assert internal

Being disabled by default
 and not well-documented, these functions cause confusion among early
 adopters as to why their code don't work properly.

Assert APIs need a proper design across Kotlin platforms.
 Since APIs are not available in common code and K/JS, it is premature
  to have such a general feature in a new experimental platform.

Compiler tests:
* Mute tests that rely on assert.
* Replace JVM-specific assert calls with require calls and unmute passed K/JS tests.

Merge-request: KT-MR-8636
Merged-by: Svyatoslav Kuzmich <svyatoslav.kuzmich@jetbrains.com>

libraries/stdlib/wasm/src/kotlin/Assertions.kt

@@ -10,14 +10,14 @@ package kotlin
 /**
  * Throws an [AssertionError] if the [value] is false.
  */
-public fun assert(value: Boolean) {
+internal fun assert(value: Boolean) {
     assert(value) { "Assertion failed" }
 }
 
 /**
  * Throws an [AssertionError] calculated by [lazyMessage] if the [value] is false.
  */
-public fun assert(value: Boolean, lazyMessage: () -> Any) {
+internal fun assert(value: Boolean, lazyMessage: () -> Any) {
     if (!value) {
         val message = lazyMessage()
         throw AssertionError(message)