Introduce basic support for `close_read` and `close_write`. #1023

Job	Run time
openssl-1.0.2u	2m 24s
openssl-1.1.0l	1m 45s
openssl-1.1.1w	1m 39s
openssl-3.0.13	2m 47s
openssl-3.1.5	3m 5s
openssl-3.2.1	3m 35s
ruby-versions / Generate Ruby versions	3s
openssl-3.3.0	3m 38s
libressl-3.1.5	2m 8s
libressl-3.2.7	2m 33s
libressl-3.3.6	2m 31s
libressl-3.4.3	2m 25s
libressl-3.5.3	2m 12s
libressl-3.6.3	2m 20s
libressl-3.7.3	2m 13s
libressl-3.8.4	2m 30s
libressl-3.9.1	2m 25s
openssl-3.0.13 fips	3m 5s
openssl-3.1.5 fips	3m 9s
openssl-3.2.1 fips	3m 7s
openssl-3.3.0 fips	3m 24s
openssl-head	3m 24s
openssl-head fips	3m 34s
openssl-head no-legacy	3m 26s
ubuntu-22.04 2.7	1m 1s
ubuntu-22.04 3.0	51s
ubuntu-22.04 3.1	1m 4s
ubuntu-22.04 3.2	1m 0s
ubuntu-22.04 3.3	54s
ubuntu-22.04 head	1m 1s
ubuntu-22.04 truffleruby	1m 22s
ubuntu-22.04 truffleruby-head	1m 30s
ubuntu-20.04 2.7	53s
ubuntu-20.04 3.0	54s
ubuntu-20.04 3.1	50s
ubuntu-20.04 3.2	49s
ubuntu-20.04 3.3	49s
ubuntu-20.04 head	56s
ubuntu-20.04 truffleruby-head	1m 21s
macos-latest 2.7	47s
macos-latest 3.0	41s
macos-latest 3.1	43s
macos-latest 3.2	39s
macos-latest 3.3	37s
macos-latest head	35s
macos-latest truffleruby-head	53s
windows-latest 2.7	6m 14s
windows-latest 3.0	4m 37s
windows-latest 3.1	3m 59s
windows-latest 3.2	4m 1s
windows-latest 3.3	4m 7s
windows-latest ucrt	3m 51s
windows-latest mswin	2m 19s
	1h 52m 40s

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