[FIR] Fix for CanBeReplacedWithOperatorAssignment Checker

compiler/fir/analysis-tests/testData/extendedCheckers/canBeReplacedWithOperatorAssignment/logicOperators.kt

@@ -0,0 +1,4 @@
+fun foo(something: Boolean) {
+    var res = false
+    res = res and something
+}

compiler/fir/analysis-tests/testData/extendedCheckers/canBeReplacedWithOperatorAssignment/logicOperators.txt

@@ -0,0 +1,5 @@
+FILE: logicOperators.kt
+    public final fun foo(something: R|kotlin/Boolean|): R|kotlin/Unit| {
+        lvar res: R|kotlin/Boolean| = Boolean(false)
+        R|<local>/res| = R|<local>/res|.R|kotlin/Boolean.and|(R|<local>/something|)
+    }