[IR] Split const folding into necessary one and for optimizations only

In this commit we have a lot of change in test data. This was caused
by the way where we evaluate constants. We split constant evaluation
into two distinct parts: only necessary evaluations for `fir2ir`
(like const val and annotations) and optimizations for lowering.
Now we don't do all constant evaluation on `fir2ir`, but IR
dump is executed after this phase, so test data changed.

#KT-58923

compiler/testData/ir/irText/stubs/simple.fir.ir.txt

@@ -0,0 +1,12 @@
+FILE fqName:<root> fileName:/simple.kt
+  PROPERTY name:test visibility:public modality:FINAL [val]
+    FIELD PROPERTY_BACKING_FIELD name:test type:kotlin.Int visibility:private [final,static]
+      EXPRESSION_BODY
+        CALL 'public final fun plus (other: kotlin.Int): kotlin.Int declared in kotlin.Int' type=kotlin.Int origin=PLUS
+          $this: CONST Int type=kotlin.Int value=2
+          other: CONST Int type=kotlin.Int value=2
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-test> visibility:public modality:FINAL <> () returnType:kotlin.Int
+      correspondingProperty: PROPERTY name:test visibility:public modality:FINAL [val]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-test> (): kotlin.Int declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:test type:kotlin.Int visibility:private [final,static]' type=kotlin.Int origin=null

compiler/testData/ir/irText/stubs/simple.fir.kt.txt

@@ -0,0 +1,3 @@
+val test: Int
+  field = 2.plus(other = 2)
+  get

compiler/testData/ir/irText/stubs/simple.kt

@@ -1,3 +1 @@
-// FIR_IDENTICAL
-
 val test = 2 + 2