[elevation Profile] Correcly add a layer generated by a processing #35610

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, OFF, OFF, ON, false, ON)	32m 27s
build (39, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, ON, ON, OFF, false, ON)	52m 25s
Run tests (5, ALL_BUT_PROVIDERS)	33m 41s
Run tests (5, POSTGRES)	6m 54s
clang-tidy (22.04, 5)	5m 20s
Run tests (5, HANA)	12m 17s
Run tests (6, ALL_BUT_PROVIDERS)	36m 49s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	6m 0s
	3h 5m 53s

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