Add "Control flow with empty body" inspection

#KT-30970 Fixed

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/anonymousFunction.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(fun(it: Int) {
+    })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/anonymousFunctionHasStatement.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(fun(it: Int) {
+        println(it)
+    })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/block.kt

@@ -0,0 +1,8 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/block2.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also({ })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasComment.kt

@@ -0,0 +1,9 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+        // comment
+    }
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasStatement.kt

@@ -0,0 +1,10 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test(i: Int) {
+    i.<caret>also {
+        foo()
+    }
+}
+
+fun foo() {}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/blockHasStatement2.kt

@@ -0,0 +1,6 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also({ println(it) })
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/functionReference.kt

@@ -0,0 +1,6 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+fun test() {
+    42.<caret>also(::println)
+}

idea/testData/inspectionsLocal/controlFlowWithEmptyBody/also/implicitReceiver.kt

@@ -0,0 +1,7 @@
+// PROBLEM: 'also' has empty body
+// FIX: none
+// WITH_RUNTIME
+
+fun String.test() {
+    <caret>also {  }
+}