Implement Java 9 module visibility checks

In this commit, only IDE tests are added, because we look for module
declarations in the IDE across the whole project, whereas in the
compiler we should do this on the module path only and that requires
separate work (KT-18599) which is done in the following commits.

(The change in Cache.kt is needed so that
JvmModuleAccessibilityChecker.ClassifierUsage, which is an inner class,
would be injected properly.)

 #KT-18598 In Progress
 #KT-18599 In Progress

idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/PluginTestCaseBase.java

@@ -19,8 +19,10 @@ package org.jetbrains.kotlin.idea.test;
 import com.intellij.openapi.projectRoots.JavaSdk;
 import com.intellij.openapi.projectRoots.Sdk;
 import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.openapi.vfs.newvfs.impl.VfsRootAccess;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.test.KotlinTestUtils;
+import org.jetbrains.kotlin.test.TestJdkKind;
 
 import java.io.File;
 
@@ -38,19 +40,36 @@ public class PluginTestCaseBase {
 
     @NotNull
     private static Sdk getSdk(String sdkHome, String name) {
-        return JavaSdk.getInstance().createJdk(name + " JDK", sdkHome, true);
+        return JavaSdk.getInstance().createJdk(name, sdkHome, true);
     }
 
     @NotNull
     public static Sdk mockJdk() {
-        return getSdk("compiler/testData/mockJDK/jre", "Mock");
+        return getSdk("compiler/testData/mockJDK/jre", "Mock JDK");
     }
 
     @NotNull
     public static Sdk fullJdk() {
         String javaHome = System.getProperty("java.home");
         assert new File(javaHome).isDirectory();
-        return getSdk(javaHome, "Full");
+        return getSdk(javaHome, "Full JDK");
+    }
+
+    @NotNull
+    public static Sdk jdk(@NotNull TestJdkKind kind) {
+        switch (kind) {
+            case MOCK_JDK:
+                return mockJdk();
+            case FULL_JDK_9:
+                File jre9 = KotlinTestUtils.getJdk9HomeIfPossible();
+                assert jre9 != null : "JDK_19 environment variable is not set";
+                VfsRootAccess.allowRootAccess(jre9.getPath());
+                return getSdk(jre9.getPath(), "Full JDK 9");
+            case FULL_JDK:
+                return fullJdk();
+            default:
+                throw new UnsupportedOperationException(kind.toString());
+        }
     }
 
     public static boolean isAllFilesPresentTest(@NotNull String testName) {