Do not require experimental propagation for body usages in same module

Unless it's a usage inside the body of an effectively public inline
function

 #KT-22759 In Progress

compiler/testData/diagnostics/testsWithStdLib/experimental/classMembers.kt

@@ -1,4 +1,5 @@
 // !API_VERSION: 1.3
+// MODULE: api
 // FILE: api.kt
 
 package api
@@ -18,6 +19,7 @@ class C {
 @ExperimentalAPI
 fun C.extension() {}
 
+// MODULE: usage1(api)
 // FILE: usage-propagate.kt
 
 package usage1
@@ -45,6 +47,7 @@ class Use {
     }
 }
 
+// MODULE: usage2(api)
 // FILE: usage-use.kt
 
 package usage2
@@ -72,6 +75,7 @@ class Use {
     }
 }
 
+// MODULE: usage3(api)
 // FILE: usage-none.kt
 
 package usage3