Swift - CodingKeys improvements #825

Job	Run time
build	33s
typescript,typescript-zod,typescript-effect-schema	2m 54s
javascript,schema-javascript	1m 10s
golang,schema-golang	1m 26s
cjson,schema-cjson	1m 41s
cplusplus,schema-cplusplus	2m 51s
flow,schema-flow	1m 44s
java,schema-java	5m 36s
python,schema-python	1m 54s
haskell,schema-haskell	9m 8s
csharp,schema-csharp,schema-json-csharp,graphql-csharp,csharp-SystemTextJson	6m 4s
json-ts-csharp	1m 57s
dart,schema-dart	1m 19s
swift,schema-swift	2m 27s
javascript-prop-types	1m 21s
ruby	1m 9s
php	59s
scala3,schema-scala3	2m 16s
rust,schema-rust	4m 1s
kotlin,schema-kotlin,kotlin-jackson,schema-kotlin-jackson	6m 42s
objective-c	2m 44s
test-complete	1s
	59m 57s

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