[Ada] Removal of technical debt

[Ada] Removal of technical debt

gcc/ada/

	* ali.adb, ali.ads (Scan_ALI): Remove use of deprecated
	parameter Ignore_ED, and all specification for Lower in call to
	Get_File_Name.
	* ali-util.adb (Read_Withed_ALIs): Modify call to Scan_ALI.
	* clean.adb (Clean_Executables): Likewise.
	* gnatbind.adb (Add_Artificial_ALI_File, Executable section):
	Likewise.
	* gnatlink.adb (Executable section): Likewise.
	* gnatls.adb (Executable section): Likewise.
	* make.adb (Check, Wait_For_Available_Slot): Likewise.
	* aspects.ads: Add Aspect_No_Controlled_Parts to
	Nonoverridable_Aspect_Id
	* opt.ads: Remove function pointers used as a workaround for
	ASIS.
	* osint-c.adb (Executable section): Remove setting of function
	pointer workarounds needed for ASIS.
	* osint.adb (Read_Default_Search_Dirs): Correct behavior to
	detect EOL characters.
	* par_sco.adb (Output_Header): Remove comment regarding use of
	First_Sloc.
	(Traverse_Sync_Definition): Renamed to
	Traverse_Protected_Or_Task_Definition.
	* pprint.adb (Interal_List_Name): Add description about purpose,
	and refactor conditional statement.
	(Prepend): Removed.
	* repinfo.adb (List_Rep_Info, Write_Info_Line): Remove use of
	subprogram pointer.
	* scng.adb (Scan): Remove CODEFIX question, and minor comment
	change.
	* sem_attr.adb (Analyze_Image_Attribute): Remove special
	processing for 'Img.
	* sem_ch6.adb (Check_Untagged_Equality): Add RM reference.
	(FCE): Add comment describing behavior.
	(Is_Non_Overriding_Operation): Minor comment formatting change.
	* sem_type.adb (Is_Actual_Subprogram): Add comment about
	Comes_From_Source test.
	(Matching_Types): Describe non-matching cases.
	* sem_util.adb (Is_Confirming): Add stub case for
	No_Controlled_Parts.