KT-6044 J2K: Convert numeric float literals to 0.2f instead of 0.2.toFloat() + more fixes related to literals and type transformations

#KT-6044 Fixed

j2k/testData/fileOrElement/field/volatileTransientAndStrictFp.kt

@@ -1,9 +1,8 @@
-// ERROR: An integer literal does not conform to the expected type kotlin.Double
 class A {
     deprecated("")
     volatile var field1 = 0
 
     transient var field2 = 1
 
-    strictfp var field3: Double = 2
+    strictfp var field3 = 2.0
 }