Promoted File#path to IO#path, added path: optional param to IO#new #4044

Job	Run time
build jvm	9m 58s
lint	19m 57s
ruby/spec on CRuby 3.0	4m 59s
build native	45m 38s
ruby/spec on CRuby 3.1	4m 0s
ruby/spec on CRuby 3.2	3m 24s
fast specs	2m 31s
test integration	15m 14s
specs :truffle	12m 55s
specs :language :core	16m 19s
specs :library :cext :security :command_line :tracepoint	12m 46s
run MRI tests on native	26m 53s
test native	3m 56s
	2h 58m 30s

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