Add to_text for PKCS7 and Timestamp::Response #1048

Job	Run time
openssl-1.0.2u	2m 22s
openssl-1.1.0l	1m 29s
openssl-1.1.1w	1m 45s
ruby-versions / Generate Ruby versions	3s
openssl-3.0.13	2m 51s
openssl-3.1.5	2m 55s
openssl-3.2.1	3m 18s
openssl-3.3.0	3m 27s
libressl-3.1.5	2m 5s
libressl-3.2.7	2m 20s
libressl-3.3.6	2m 11s
libressl-3.4.3	2m 13s
libressl-3.5.3	2m 12s
libressl-3.6.3	2m 14s
libressl-3.7.3	2m 15s
libressl-3.8.4	2m 25s
libressl-3.9.1	2m 7s
openssl-3.0.13 fips	2m 44s
openssl-3.1.5 fips	2m 46s
openssl-3.2.1 fips	3m 7s
openssl-3.3.0 fips	3m 16s
openssl-head	3m 21s
openssl-head fips	3m 16s
openssl-head no-legacy	3m 14s
ubuntu-22.04 2.7	56s
ubuntu-22.04 3.0	53s
ubuntu-22.04 3.1	56s
ubuntu-22.04 3.2	56s
ubuntu-22.04 3.3	55s
ubuntu-22.04 head	1m 0s
ubuntu-22.04 truffleruby	1m 25s
ubuntu-22.04 truffleruby-head	1m 27s
ubuntu-20.04 2.7	1m 2s
ubuntu-20.04 3.0	49s
ubuntu-20.04 3.1	1m 0s
ubuntu-20.04 3.2	53s
ubuntu-20.04 3.3	55s
ubuntu-20.04 head	49s
ubuntu-20.04 truffleruby-head	1m 28s
macos-latest 2.7	47s
macos-latest 3.0	35s
macos-latest 3.1	37s
macos-latest 3.2	38s
macos-latest 3.3	44s
macos-latest head	36s
macos-latest truffleruby-head	55s
windows-latest 2.7	5m 56s
windows-latest 3.0	1m 55s
windows-latest 3.1	1m 58s
windows-latest 3.2	2m 2s
windows-latest 3.3	4m 33s
windows-latest ucrt	3m 41s
windows-latest mswin	2m 54s
	1h 43m 11s

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