Support `symbolize_names` argument to `MatchData#named_captures` #5044

Job	Run time
lint	18m 1s
build jvm	9m 23s
ruby/spec on CRuby 3.0	3m 26s
build native	16m 34s
ruby/spec on CRuby 3.1	3m 36s
ruby/spec on CRuby 3.2	3m 9s
fast specs	1m 35s
specs :truffle	14m 38s
specs :language :core	12m 46s
test integration	9m 21s
specs :library :cext :security :command_line :tracepoint	9m 28s
test native	3m 7s
run MRI tests on native	19m 7s
	2h 4m 11s

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