Instruct platform code to use NIO2 always

since we're not always use jna (means that we can get warnings about missing jna libs)
and according to the IDEA team, NIO2 works well enough to rely on it

plugins/scripting/scripting-compiler/tests/org/jetbrains/kotlin/scripting/compiler/plugin/ScriptProviderTest.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.scripting.compiler.plugin
 
+import org.jetbrains.kotlin.cli.common.environment.setIdeaIoUseFallback
 import org.jetbrains.kotlin.scripting.compiler.plugin.definitions.CliScriptDefinitionProvider
 import org.jetbrains.kotlin.scripting.definitions.KotlinScriptDefinition
 import org.jetbrains.kotlin.scripting.definitions.ScriptDefinition
@@ -19,6 +20,10 @@ import kotlin.script.templates.standard.ScriptTemplateWithArgs
 
 class ScriptProviderTest {
 
+    init {
+        setIdeaIoUseFallback()
+    }
+
     @Test
     fun testLazyScriptDefinitionsProvider() {
 

plugins/scripting/scripting-compiler/tests/org/jetbrains/kotlin/scripting/compiler/plugin/ScriptingCompilerPluginTest.kt

@@ -10,6 +10,7 @@ import junit.framework.TestCase
 import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.common.config.addKotlinSourceRoots
+import org.jetbrains.kotlin.cli.common.environment.setIdeaIoUseFallback
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageLocation
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
@@ -43,6 +44,10 @@ class ScriptingCompilerPluginTest : TestCase() {
         const val TEST_DATA_DIR = "plugins/scripting/scripting-compiler/testData"
     }
 
+    init {
+        setIdeaIoUseFallback()
+    }
+
     private val kotlinPaths: KotlinPaths by lazy(LazyThreadSafetyMode.PUBLICATION) {
         val paths = PathUtil.kotlinPathsForDistDirectory
         TestCase.assertTrue("Lib directory doesn't exist. Run 'ant dist'", paths.libPath.absoluteFile.isDirectory)

plugins/scripting/scripting-compiler/tests/org/jetbrains/kotlin/scripting/compiler/plugin/ScriptingWithCliCompilerTest.kt

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.scripting.compiler.plugin
 
 import junit.framework.Assert
+import org.jetbrains.kotlin.cli.common.environment.setIdeaIoUseFallback
 import org.junit.Test
 import java.io.File
 
@@ -15,6 +16,10 @@ class ScriptingWithCliCompilerTest {
         const val TEST_DATA_DIR = "plugins/scripting/scripting-compiler/testData"
     }
 
+    init {
+        setIdeaIoUseFallback()
+    }
+
     @Test
     fun testResultValue() {
         runWithK2JVMCompiler("$TEST_DATA_DIR/integration/intResult.kts", listOf("10"))