Add inspection for calls of function with lambda expression body

Added "Unused return value of a function with lambda expression body" inspection with quickfix "Remove '=' token from function declaration"

#KT-10393 Fixed

idea/testData/quickfix/removeEqTokenFromFunctionDeclaration/simple.kt

@@ -0,0 +1,9 @@
+// "Remove '=' token from function declaration" "true"
+
+fun foo() {
+    <caret>bar()
+}
+
+fun bar() = {
+
+}