insert type intention now only applicable in function names (KT-4950)

#KT-4950 Fixed

idea/testData/intentions/insertExplicitTypeArguments/inapplicableNotInCallable.kt

@@ -0,0 +1,6 @@
+// IS_APPLICABLE: false
+fun foo() {
+    val x = bar("<caret>x")
+}
+
+fun bar<T>(t: T): Int = 1

idea/testData/intentions/insertExplicitTypeArguments/inapplicableNotInCallable2.kt

@@ -0,0 +1,6 @@
+// IS_APPLICABLE: false
+fun foo() {
+    val x = bar("x") { <caret>2 }
+}
+
+fun bar<T>(t: T, v : () -> Int): Int = 1