Treat ASN1_STRING as opaque #1710

Job	Run time
ubuntu-24.04-s390x	1m 44s
ubuntu-24.04-ppc64le	1m 33s
ruby-versions / Generate Ruby versions	4s
openssl-3.0.18	1m 18s
openssl-1.1.1w	54s
libressl-3.9.2	1m 1s
openssl-master	3m 51s
openssl-3.5.4	1m 18s
openssl-3.3.5	1m 21s
libressl-4.1.1	59s
openssl-3.4.3	1m 20s
openssl-3.1.8	1m 16s
libressl-4.0.1	55s
openssl-3.2.6	1m 19s
openssl-3.6.0	1m 19s
openssl-3.5.4 without legacy provider	1m 26s
aws-lc-latest	3m 29s
ubuntu-latest 2.7	1m 1s
ubuntu-latest 3.1	58s
ubuntu-latest 3.4	1m 0s
ubuntu-latest 3.0	54s
ubuntu-latest head	1m 2s
ubuntu-latest 3.2	1m 0s
ubuntu-latest truffleruby	1m 57s
ubuntu-latest 3.3	57s
macos-latest 3.4	41s
ubuntu-latest truffleruby-head	1m 54s
macos-latest 3.3	57s
macos-latest 2.7	52s
macos-latest 3.0	56s
macos-latest head	1m 1s
macos-latest truffleruby	1m 16s
macos-latest 3.2	50s
windows-latest 2.7	3m 58s
macos-latest truffleruby-head	1m 15s
windows-latest 3.0	3m 20s
windows-latest 3.4	3m 32s
macos-latest 3.1	41s
windows-latest 3.1	3m 26s
windows-latest head	3m 18s
windows-latest ucrt	2m 4s
windows-latest 3.2	3m 38s
windows-latest mswin	2m 39s
windows-latest 3.3	3m 27s
	1h 13m 41s

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