[FIR] Add inline checker for bodies of inline functions

This checker doesn't support `@PublishedAPI` yet, so some BB tests for it
 were muted. #KT-46270

compiler/testData/diagnostics/tests/inline/extensionOnFunction.fir.kt

@@ -20,9 +20,9 @@ inline fun testExtension(s: (p: Int) -> Unit) {
 }
 
 inline fun inlineFunWrongExtension(s: (p: Int) -> Unit) {
-    s.noInlineExt(11)
+    s.<!USAGE_IS_NOT_INLINABLE!>noInlineExt<!>(11)
 }
 
 inline fun inlineFunNoInline(noinline s: (p: Int) -> Unit) {
     s.noInlineExt(11)
-}
+}