[qml] Upgrade QgsRectangle to Q_GADGET and expose QgsLocatorContext transformContext as property #34851

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, OFF, OFF, ON, false)	1h 32m 52s
build (39, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, ON, ON, OFF, false)	2h 49m 44s
clang-tidy (22.04, 5)	6m 22s
Run tests (5, ALL_BUT_PROVIDERS)	31m 54s
Run tests (5, POSTGRES)	6m 35s
Run tests (5, HANA)	6m 58s
Run tests (6, ALL_BUT_PROVIDERS)	38m 23s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	7m 1s
	5h 59m 49s

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