JVM_IR: Avoid using parent name in name of captures.

If parent is an anonymous object that could lead to the use
of names such as `$this$no name provided` which is invalid
in dex files.

compiler/testData/codegen/bytecodeText/mangling/parentheses.kt

@@ -19,10 +19,5 @@ fun box(): String {
 
 // One instance of each is in kotlin.Metadata.d2
 // 1 \(X\)
-
-// JVM_TEMPLATES
 // 1 \(Y\)
-
-// JVM_IR_TEMPLATES
-// 5 \(Y\)
-// 4 \$this\$\(Y\)
+// 4 \$this