[Backport release-3_34] [map layer] When saving/loading 'Rendering' category to/from QML, including auto refresh details #33059

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, ON, false)	1h 26m 4s
build (38, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, OFF, false)	2h 18m 39s
clang-tidy (22.04, 5)	4m 56s
Run tests (5, ALL_BUT_PROVIDERS)	28m 18s
Run tests (5, POSTGRES)	4m 25s
Run tests (5, HANA)	3m 37s
Run tests (6, ALL_BUT_PROVIDERS)	9m 24s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	6m 35s
	4h 41m 58s

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