[K/N] Get rid of urls in perf infra code

kotlin-native/tools/performance-server/src/main/kotlin-js/org/jetbrains/analyzer/Utils.kt

@@ -26,4 +26,6 @@ actual fun assert(value: Boolean, lazyMessage: () -> Any) {
 
 actual fun sendGetRequest(url: String, user: String?, password: String?, followLocation: Boolean) : String {
     error("Unsupported")
-}
+}
+
+actual fun getDefaultPerformanceServerUrl() : String? = null

kotlin-native/tools/performance-server/ui/src/main/kotlin/main.kt

@@ -132,7 +132,7 @@ fun customizeChart(chart: dynamic, chartContainer: String, jquerySelector: dynam
                     previousBuild = builds.get(data.index - shift)
                     shift++
                 }
-                val linkToDetailedInfo = "https://kotlin-native-perf-summary.labs.jb.gg/compare?report=" +
+                val linkToDetailedInfo = "${window.location.origin}/compare?report=" +
                         "${currentBuild.buildNumber}:${parameters["target"]}" +
                         "${previousBuild?.let {
                             "&compareTo=${previousBuild.buildNumber}:${parameters["target"]}"
@@ -190,7 +190,7 @@ fun getDatesComponents() = "${beforeDate?.let {"&before=${encodeURIComponent(it)
         "${afterDate?.let {"&after=${encodeURIComponent(it)}"} ?: ""}"
 
 fun main(args: Array<String>) {
-    val serverUrl = "https://kotlin-native-perf-summary.labs.jb.gg" // use "http://localhost:3000" for local debug.
+    val serverUrl = window.location.origin // use "http://localhost:3000" for local debug.
     val zoomRatio = 2
 
     // Get parameters from request.