Promoted File#path to IO#path, added path: optional param to IO#new #4041

Job	Run time
build jvm	12m 18s
lint	28m 53s
build native	41m 20s
ruby/spec on CRuby 3.0	4m 18s
ruby/spec on CRuby 3.1	5m 15s
ruby/spec on CRuby 3.2	4m 49s
test integration	15m 5s
specs :truffle	14m 15s
fast specs	3m 1s
specs :language :core	19m 16s
specs :library :cext :security :command_line :tracepoint	13m 28s
run MRI tests on native	23m 16s
test native	3m 37s
	3h 8m 51s

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