Add file name to file-private metaclass types during codegen (#15505) #13623

Job	Run time
x86_64-gnu-test	32m 47s
x86_64-gnu-test (FLAGS=-Dwithout_ffi USE_PCRE1=true, 1.0.0)	31m 14s
check_format	1m 33s
x86_64-gnu-test-preview_mt	5m 38s
x86_64-musl-test	32m 59s
	1h 44m 11s

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