Unnecessary local variable: highlight with INFORMATION level when initializer has any multi-line blocks (#3359)

#KT-26752 Fixed

idea/testData/inspectionsLocal/unnecessaryVariable/ifElse2.kt.after

@@ -0,0 +1,8 @@
+// HIGHLIGHT: GENERIC_ERROR_OR_WARNING
+fun test(b: Boolean): Int {
+    return if (b) foo() else bar()
+}
+
+fun foo() = 1
+
+fun bar() = 2