Optimize more redundant kotlin/jvm/internal/Refs

The number of initializations of the `value` field before the live range
begins does not really matter so long as we insert a write of a default
value to the local if there were none.

compiler/testData/codegen/bytecodeText/localInitializationLVT/run.kt

@@ -1,6 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
-// TODO KT-36648 Captured variables not optimized in JVM_IR
-
 fun test(): Char {
     val c: Char
     run {
@@ -12,4 +9,4 @@ fun test(): Char {
 
 // The first on declaration, the other on initialization
 // 2 ISTORE 0
-// 1 LOCALVARIABLE c C L1 L.* 0
+// 1 LOCALVARIABLE c C