Remove `jsonErrorPosition` unless GRDBCUSTOMSQLITE || GRDBCIPHER #1168

Job	Run time
CustomSQLite (Xcode_14.3.1.app, macOS-13, Xcode 14.3.1)	7m 38s
SQLCipher3 (Xcode_14.3.1.app, macOS-13, Xcode 14.3.1)	9m 31s
CustomSQLite (Xcode_14.0.1.app, macOS-12, Xcode 14.0.1)	6m 4s
Framework (Xcode_14.3.1.app, macOS-13, platform=macOS, macOS)	5m 53s
SQLCipher3 (Xcode_14.0.1.app, macOS-12, Xcode 14.0.1)	9m 44s
SPM (Xcode_14.3.1.app, macOS-13, Xcode 14.3.1)	15m 56s
Framework (Xcode_14.3.1.app, macOS-13, OS=16.4,name=iPhone 14 Pro, iOS)	8m 12s
SPM (Xcode_14.2.app, macOS-13, Xcode 14.2)	10m 9s
Framework (Xcode_14.3.1.app, macOS-13, OS=16.4,name=Apple TV, tvOS)	7m 12s
SPM (Xcode_14.1.app, macOS-13, Xcode 14.1)	16m 32s
SQLCipher4 (Xcode_14.3.1.app, macOS-13, Xcode 14.3.1)	19m 43s
Framework (Xcode_14.2.app, macOS-13, platform=macOS, macOS)	1m 51s
XCFramework (Xcode_14.3.1.app, macOS-13, Xcode 14.3.1)	6m 33s
SPM (Xcode_14.0.1.app, macOS-12, Xcode 14.0.1)	10m 54s
Framework (Xcode_14.2.app, macOS-13, OS=16.2,name=iPhone 14, iOS)	9m 21s
XCFramework (Xcode_14.0.1.app, macOS-12, Xcode 14.0.1)	5m 30s
Framework (Xcode_14.1.app, macOS-13, platform=macOS, macOS)	5m 56s
SQLCipher4 (Xcode_14.0.1.app, macOS-12, Xcode 14.0.1)	19m 50s
Framework (Xcode_14.1.app, macOS-13, OS=16.1,name=iPhone 14, iOS)	9m 25s
Framework (Xcode_14.0.1.app, macOS-12, platform=macOS, macOS)	5m 5s
Framework (Xcode_14.0.1.app, macOS-12, OS=16.0,name=iPhone 14, iOS)	6m 49s
	3h 17m 48s

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