[IR] Turned off IR validation for everything but our tests

kotlin-native/build-tools/src/main/groovy/org/jetbrains/kotlin/KonanTest.groovy

@@ -34,6 +34,7 @@ class RunExternalTestGroup extends JavaExec {
     def dist = UtilsKt.getKotlinNativeDist(project)
 
     def enableKonanAssertions = true
+    def verifyIr = true
     String outputDirectory = null
     String goldValue = null
     // Checks test's output against gold value and returns true if the output matches the expectation
@@ -100,6 +101,9 @@ class RunExternalTestGroup extends JavaExec {
             if (enableKonanAssertions) {
                 args "-ea"
             }
+            if (verifyIr) {
+                args "-Xverify-ir"
+            }
             if (project.hasProperty("test_verbose")) {
                 println("Files to compile: $filesToCompile")
                 println(args)

kotlin-native/build-tools/src/main/kotlin/org/jetbrains/kotlin/KotlinNativeTest.kt

@@ -333,11 +333,21 @@ open class KonanStandaloneTest : KonanLocalTest() {
     @Input @Optional
     var enableKonanAssertions = true
 
+    @Input @Optional
+    var verifyIr = true
+
     /**
      * Compiler flags used to build a test.
      */
     var flags: List<String> = listOf()
-        get() = if (enableKonanAssertions) field + "-ea" else field
+        get() {
+            val result = field.toMutableList()
+            if (enableKonanAssertions)
+                result += "-ea"
+            if (verifyIr)
+                result += "-Xverify-ir"
+            return result
+        }
 
     fun getSources(): Provider<List<String>> = project.provider {
         val sources = buildCompileList(project.file(source).toPath(), outputDirectory)