[K/N][tests] Don't attempt to download simulator after first failure

Sometimes, e.g. due to a bug in Xcode, downloading a simulator runtime
might fail. See e.g. 89589210 here:
https://developer.apple.com/documentation/xcode-release-notes/xcode-14-release-notes

In that case, it makes little sense to try downloading the same
simulator runtime later again.
Moreover, such attempts might lead to accumulating stale downloads in
/Library/Developer/CoreSimulator/Images/Inbox/, wasting disk space.

This commit caches the download result, so that if the first attempt
fails, then the later attempts will just rethrow the same exception.

^KTI-1683

native/executors/src/main/kotlin/org/jetbrains/kotlin/native/executors/XcodeSimulatorExecutor.kt

@@ -135,7 +135,13 @@ class XcodeSimulatorExecutor(
         return checkNotNull(simulatorRuntimeOrNull()) { "Runtime is not available for the selected $deviceId. Check Xcode installation" }
     }
 
-    private fun downloadRuntimeFor(osName: String) {
+    private val downloadRuntimeResultByOsName = mutableMapOf<String, Result<Unit>>()
+
+    private fun downloadRuntimeFor(osName: String) = downloadRuntimeResultByOsName.getOrPut(osName) {
+        runCatching { downloadRuntimeForImpl(osName) }
+    }.getOrThrow()
+
+    private fun downloadRuntimeForImpl(osName: String) {
         val version = Xcode.findCurrent().version
         check(version.major >= 14) {
             "Was unable to get the required runtimes running on Xcode $version. Check the Xcode installation"