Replace with safe call works now on UNSAFE_IMPLICIT_INVOKE #KT-12628 Fixed

(cherry picked from commit 208798d)

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvoke.kt

@@ -0,0 +1,3 @@
+// "Replace with safe (?.) call" "true"
+
+fun foo(exec: (() -> Unit)?) = exec<caret>()

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvoke.kt.after

@@ -0,0 +1,3 @@
+// "Replace with safe (?.) call" "true"
+
+fun foo(exec: (() -> Unit)?) = exec?.invoke()

idea/testData/quickfix/nullables/unsafeInfixCall/unsafeInvokeWithReceiver.kt

@@ -0,0 +1,7 @@
+// "Replace with safe (?.) call" "false"
+// ACTION: Convert to block body
+// ACTION: Replace overloaded operator with function call
+// ACTION: Wrap with '?.let { ... }' call
+// ERROR: Reference has a nullable type '(String.() -> Unit)?', use explicit '?.invoke()' to make a function-like call instead
+
+fun foo(exec: (String.() -> Unit)?) = "".exec<caret>()