[Backport release-3_34] [processing] Guard QGIS from crashing due to erroneous extent / invalid CRS in XYZ creation algorithms #36457

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, ON, false)	1h 29m 36s
build (38, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, OFF, false)	2h 19m 5s
clang-tidy (22.04, 5)	3m 51s
Run tests (5, ALL_BUT_PROVIDERS)	31m 8s
Run tests (5, POSTGRES)	5m 46s
Run tests (5, HANA)	5m 47s
Run tests (6, ALL_BUT_PROVIDERS)	8m 52s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	5m 49s
	4h 49m 54s

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