Load default values for annotation members from classfiles

so that defaults are available to synthetic implementations.

#KT-48181 Fixed

Implementation is for JVM IR; other backends & FIR need to be supported
separately.

compiler/testData/loadJava/compiledKotlin/annotations/classMembers/EnumEntry.kt

@@ -1,4 +1,6 @@
 // ALLOW_AST_ACCESS
+// NO_CHECK_SOURCE_VS_BINARY
+//^ While compiling source, we do not store annotation default values, but we load them when reading compiled files
 package test
 
 annotation class Anno(val value: String = "0", val x: Int = 0)

compiler/testData/loadJava/compiledKotlin/annotations/classMembers/EnumEntry.txt

@@ -2,9 +2,9 @@ package test
 
 public final annotation class Anno : kotlin.Annotation {
     /*primary*/ public constructor Anno(/*0*/ value: kotlin.String = ..., /*1*/ x: kotlin.Int = ...)
-    public final val value: kotlin.String
+    public final val value: kotlin.String = "0"
         public final fun <get-value>(): kotlin.String
-    public final val x: kotlin.Int
+    public final val x: kotlin.Int = 0
         public final fun <get-x>(): kotlin.Int
 }