[Test] Add debug names to unnamed test disposables

- This helps to track down disposables which are never disposed, and
  reduces confusion when printing disposables in general (the names will
  now be meaningful, instead of endless lists of "newDisposable" and
  "TestDisposable").

^KT-64099

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt

@@ -100,7 +100,7 @@ open class IncrementalFirJvmCompilerRunner(
 
         val exitCode = ExitCode.OK
         val allCompiledSources = LinkedHashSet<File>()
-        val rootDisposable = Disposer.newDisposable()
+        val rootDisposable = Disposer.newDisposable("Disposable for ${IncrementalFirJvmCompilerRunner::class.simpleName}.runCompiler")
 
         try {
             // - configuration

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunner.kt

@@ -107,7 +107,8 @@ open class IncrementalJvmCompilerRunner(
             psiFileFactory.createFileFromText(file.nameWithoutExtension, JavaLanguage.INSTANCE, file.readText())
 
         private val psiFileFactory: PsiFileFactory by lazy {
-            val rootDisposable = Disposer.newDisposable()
+            val rootDisposable =
+                Disposer.newDisposable("Disposable for PSI file factory of ${IncrementalJvmCompilerRunner::class.simpleName}")
             val configuration = compilerConfiguration
             val environment =
                 KotlinCoreEnvironment.createForProduction(rootDisposable, configuration, EnvironmentConfigFiles.JVM_CONFIG_FILES)

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/parsing/parseFileUtils.kt

@@ -30,7 +30,7 @@ fun classesFqNames(files: Set<File>): Set<String> {
     val existingKotlinFiles = files.filter { it.name.endsWith(".kt", ignoreCase = true) && it.isFile }
     if (existingKotlinFiles.isEmpty()) return emptySet()
 
-    val disposable = Disposer.newDisposable()
+    val disposable = Disposer.newDisposable("Disposable for org.jetbrains.kotlin.incremental.parsing.classesFqNames")
 
     return try {
         classesFqNames(existingKotlinFiles, disposable)