add expression functions to create CRS from string definition and to get CRS authid (refs #58313) #37292

Job	Run time
build (24.04, 5, true, OFF, ON, ON, ON, ON, OFF, OFF, OFF, OFF, ON, false, ON)	34m 7s
build (39, 6, true, ON, OFF, ON, ON, OFF, OFF, ON, ON, ON, OFF, false, ON)	53m 54s
clang-tidy (24.04, 5)	11m 36s
Run tests (5, ALL_BUT_PROVIDERS)	31m 54s
Run tests (5, POSTGRES)	6m 57s
Run tests (5, HANA)	13m 26s
Run tests (6, ALL_BUT_PROVIDERS)	38m 25s
Run tests (5, ORACLE, 24.04, binary-for-oracle)	7m 35s
	3h 17m 54s

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