FE: forbid extension calls on inline functional parameters

Extension receivers are currently implicitly noinline, and changing that
would require modifying the syntax to allow marking them noinline or
crossinline.

^KT-5837 Open
^KT-25787 Fixed
^KT-47965 Fixed
^KT-50107 Fixed
^KT-52403 Fixed

compiler/testData/diagnostics/tests/inline/binaryExpressions/mathOperations.kt

@@ -17,13 +17,13 @@ inline operator fun <T, U, V> @ExtensionFunctionType Function2<T, U, V>.plus(p:
 }
 
 inline fun <T, U, V> inlineFunWithInvoke(s: (p: T) -> U, ext: T.(p: U) -> V) {
-    s + s
-    ext + ext
+    <!USAGE_IS_NOT_INLINABLE!>s<!> + s
+    <!USAGE_IS_NOT_INLINABLE!>ext<!> + ext
 }
 
 inline fun <T, U, V> inlineFunWithInvoke(s: (p: T) -> U, ext: T.(p: U) -> V) {
-    s + s
-    ext + ext
+    <!USAGE_IS_NOT_INLINABLE!>s<!> + s
+    <!USAGE_IS_NOT_INLINABLE!>ext<!> + ext
 }
 
 inline fun <T, U> Function1<T, U>.submit() {