[JS IR] - Remove file lowering declarations from lowering phases

- rename fileToPurenessInitializers onto fileToInitializerPureness
- remove redundant check on top-level property

[JS IR] Rename initialis* to initializ* for consistency

[JS IR] Move propertyLazyInitialization property to context from configuration

[JS IR] Add test on lazy initialization properties order

[JS IR] Add multi module for lazy initialization of properties

[JS IR] Move tests onto js.translator

[JS IR] Rename fileToInitializerPureness according to context name

^KT-43222 fixed

compiler/testData/codegen/box/properties/lazyInitialization.kt

@@ -1,18 +0,0 @@
-// IGNORE_BACKEND: JS, NATIVE
-// DONT_TARGET_EXACT_BACKEND: WASM
-// PROPERTY_LAZY_INITIALISATION
-
-// FILE: A.kt
-
-val o = "O"
-
-// FILE: B.kt
-val ok = o + k
-
-// FILE: C.kt
-
-val k = "K"
-
-// FILE: main.kt
-
-fun box(): String = ok