[Backport release-3_34] Fix negative angles for symbols are ignored when exporting to SLD #34626

Job	Run time
build (22.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, ON, false)	1h 29m 7s
build (38, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, OFF, false)	2h 23m 11s
clang-tidy (22.04, 5)	3m 52s
Run tests (5, ALL_BUT_PROVIDERS)	27m 26s
Run tests (5, POSTGRES)	5m 34s
Run tests (5, HANA)	4m 3s
Run tests (6, ALL_BUT_PROVIDERS)	9m 12s
Run tests (5, ORACLE, 22.04, binary-for-oracle)	4m 59s
	4h 47m 24s

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