Support non-blocking `File#read` and `#write` on Windows (#14940) #12199

Job	Run time
check_format	1m 36s
deploy_api_docs	2m 1s
x86_64-gnu-test (1.7.3)	33m 40s
x86_64-gnu-test-preview_mt	5m 52s
x86_64-gnu-test (1.8.2)	34m 30s
x86_64-musl-test	35m 56s
x86_64-gnu-test (1.9.2)	33m 38s
x86_64-gnu-test (1.10.1)	33m 10s
x86_64-gnu-test (1.11.2)	34m 38s
x86_64-gnu-test (1.12.2)	32m 44s
x86_64-gnu-test (1.13.2)	35m 22s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	33m 15s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	33m 53s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	35m 48s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	34m 42s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	33m 45s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	33m 40s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	34m 40s
	8h 42m 50s

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