ada: Back out removal of renaming tranformation

ada: Back out removal of renaming tranformation

A previous change (commit 33eebd96d27fa2b29cec79f55167a11aaf7f4802)
removed code in Analyze_Object_Renaming that tranformed renamings
into object declarations. This reinstates that code.

Removing the code causes failures in
gnatbugs-large/2023/gnat-435_deep_blue_capital.
Ideally, we SHOULD remove that transformation at some point,
but that will require further changes.

gcc/ada/ChangeLog:

	* exp_ch6.adb: (Make_Build_In_Place_Call_In_Object_Declaration):
	Deal with renamings transformed into object declarations.
	* sem_ch8.adb (Analyze_Object_Renaming):
	Reinstate transformation of a renaming into
	an object declaration.