"Remove redundant '.let' call" intention: handle it inside function call

So #KT-20583 Fixed

idea/testData/intentions/replaceSingleLineLetIntention/functionCall1.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let<caret> { foo("", 1) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall1.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    <caret>foo("", 1)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall2.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let { foo(it, 1)<caret> }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall2.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    <caret>foo(s, 1)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall3.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let<caret> { foo("", it.length) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall3.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    foo("", s.length)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall4.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let<caret> { x -> foo("", x.length) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall4.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    foo("", s.length)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall5.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.length.let<caret> { foo("", it) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall5.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    foo("", s.length)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall6.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    fun bar() = ""
+    bar().let<caret> { foo(it, 1) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall6.kt.after

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    fun bar() = ""
+    foo(bar(), 1)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCall7.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val s = ""
+    s.let<caret> { foo(it, it.length) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCallInExtension.kt

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun String.baz(): Int {
+    return let<caret> { foo(it, 1) }
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCallInExtension.kt.after

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun String.baz(): Int {
+    return foo(this, 1)
+}

idea/testData/intentions/replaceSingleLineLetIntention/functionCallOnSafeCall.kt

@@ -0,0 +1,9 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+
+fun foo(s: String, i: Int) = s.length + i
+
+fun test() {
+    val nullable: String? = null
+    nullable?.let<caret> { foo(it, 1) }
+}