Show warnings to user when encountered while converting vector tile style #32174

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, OFF, OFF, ON, false)	17m 58s
build (39, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, ON, ON, OFF, false)	28m 34s
clang-tidy (22.04, 5)	5m 58s
Run tests (5, ALL_BUT_PROVIDERS)	29m 37s
Run tests (5, POSTGRES)	6m 7s
Run tests (5, HANA)	5m 23s
Run tests (6, ALL_BUT_PROVIDERS)	33m 37s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	6m 46s
	2h 14m 0s

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