ssl: remove redundant ossl_ssl_ex_vcb_idx #1165

Job	Run time
openssl-1.0.2u	52s
openssl-1.1.0l	51s
openssl-1.1.1w	52s
openssl-3.0.14	55s
openssl-3.1.6	55s
openssl-3.2.2	57s
openssl-3.3.1	58s
openssl-master	3m 42s
libressl-3.1.5	51s
libressl-3.2.7	1m 5s
libressl-3.3.6	59s
libressl-3.4.3	1m 1s
libressl-3.5.3	59s
libressl-3.6.3	59s
libressl-3.7.3	55s
libressl-3.8.4	58s
libressl-3.9.2	55s
openssl-3.0.14 with fips provider	38s
openssl-3.1.6 with fips provider	37s
openssl-3.2.2 with fips provider	43s
openssl-3.3.1 with fips provider	39s
openssl-master with fips provider	3m 22s
openssl-3.3.1 without legacy provider	1m 5s
ruby-versions / Generate Ruby versions	3s
ubuntu-22.04 2.7	1m 2s
ubuntu-22.04 3.0	54s
ubuntu-22.04 3.1	1m 1s
ubuntu-22.04 3.2	1m 3s
ubuntu-22.04 3.3	1m 2s
ubuntu-22.04 head	1m 4s
ubuntu-22.04 truffleruby	1m 38s
ubuntu-22.04 truffleruby-head	1m 45s
ubuntu-20.04 2.7	57s
ubuntu-20.04 3.0	53s
ubuntu-20.04 3.1	57s
ubuntu-20.04 3.2	58s
ubuntu-20.04 3.3	54s
ubuntu-20.04 head	55s
ubuntu-20.04 truffleruby	1m 39s
ubuntu-20.04 truffleruby-head	1m 39s
macos-latest 2.7	48s
macos-latest 3.0	37s
macos-latest 3.1	39s
macos-latest 3.2	38s
macos-latest 3.3	38s
macos-latest head	40s
macos-latest truffleruby	54s
macos-latest truffleruby-head	1m 1s
windows-latest 2.7	5m 35s
windows-latest 3.0	3m 36s
windows-latest 3.1	4m 26s
windows-latest 3.2	4m 3s
windows-latest 3.3	4m 11s
windows-latest head	3m 43s
windows-latest ucrt	3m 44s
windows-latest mswin	3m 7s
	1h 22m 32s

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