[K/JS] Support eager initialization for per-file granularity

js/js.translator/testData/box/esModules/crossModuleRefPerFile/eagerInitializationGlobal1.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JS_IR
+// IGNORE_BACKEND: WASM
+// ES_MODULES
+// PROPERTY_LAZY_INITIALIZATION
+
+// FILE: lib.kt
+var z1 = false
+var z2 = false
+
+// FILE: lib2.kt
+
+@OptIn(kotlin.ExperimentalStdlibApi::class)
+@EagerInitialization
+val x = foo()
+
+private fun foo(): Int {
+    z1 = true
+    return 42
+}
+
+// Will be initialized since [x]'s initializer calls a function from the file.
+val y = run { z2 = true; 117 }
+
+// FILE: main.kt
+
+fun box(): String {
+    return return if (z1 && z2) "OK" else "fail"
+}

js/js.translator/testData/box/esModules/crossModuleRefPerFile/eagerInitializationGlobal2.kt

@@ -0,0 +1,23 @@
+// TARGET_BACKEND: JS_IR
+// IGNORE_BACKEND: WASM
+// ES_MODULES
+// PROPERTY_LAZY_INITIALIZATION
+
+// FILE: lib.kt
+var z1 = false
+var z2 = false
+
+// FILE: lib2.kt
+
+@OptIn(kotlin.ExperimentalStdlibApi::class)
+@EagerInitialization
+val x = run { z1 = true; 42 }
+
+// Won't be initialized (cause no function from the file will be called during [x] initialization).
+val y = run { z2 = true; 117 }
+
+// FILE: main.kt
+
+fun box(): String {
+    return if (z1 && !z2) "OK" else "fail"
+}

js/js.translator/testData/box/esModules/crossModuleRefPerFile/eagerInitializationGlobal3.kt

@@ -0,0 +1,19 @@
+// TARGET_BACKEND: JS_IR
+// IGNORE_BACKEND: WASM
+// ES_MODULES
+// PROPERTY_LAZY_INITIALIZATION
+
+// FILE: lib.kt
+var z1 = false
+
+// FILE: lib2.kt
+
+@OptIn(kotlin.ExperimentalStdlibApi::class)
+@EagerInitialization
+val x = run { z1 = !z1; 42 }
+
+val y = run { 73 }
+
+fun box(): String {
+    return if (z1) "OK" else "fail"
+}