[Ada] Remove End_Interp_List from the overloaded resolution API
gcc/ada/
* sem_ch4.adb (Analyze_Call): Remove call to End_Interp_List.
(Process_Overloaded_Indexed_Component): Remove call to
End_Interp_List.
* sem_util.adb (Insert_Explicit_Dereference): Remove call to
End_Interp_List.
* sem_type.ads (End_Interp_List): Remove.
* sem_type.adb (Add_Entry): The guard against duplicate entries
is now checked before other conditions, so that EXIT statements
do not bypass this guard.
(End_Interp_List): Remove.