Fix test_provider.rb in FIPS. #1168

Job	Run time
openssl-1.0.2u	49s
openssl-1.1.0l	53s
openssl-1.1.1w	59s
openssl-3.0.14	58s
openssl-3.1.6	54s
openssl-3.2.2	55s
ruby-versions / Generate Ruby versions	2s
openssl-3.3.1	1m 1s
openssl-master	3m 47s
libressl-3.1.5	53s
libressl-3.2.7	57s
libressl-3.3.6	1m 3s
libressl-3.4.3	1m 0s
libressl-3.5.3	58s
libressl-3.6.3	58s
libressl-3.7.3	1m 1s
libressl-3.8.4	56s
libressl-3.9.2	1m 0s
openssl-3.0.14 with fips provider	39s
openssl-3.1.6 with fips provider	43s
openssl-3.2.2 with fips provider	45s
openssl-3.3.1 with fips provider	45s
openssl-master with fips provider	3m 32s
openssl-3.3.1 without legacy provider	55s
ubuntu-22.04 2.7	58s
ubuntu-22.04 3.0	57s
ubuntu-22.04 3.1	1m 2s
ubuntu-22.04 3.2	1m 2s
ubuntu-22.04 3.3	1m 0s
ubuntu-22.04 head	1m 0s
ubuntu-22.04 truffleruby	1m 35s
ubuntu-22.04 truffleruby-head	1m 43s
ubuntu-20.04 2.7	1m 0s
ubuntu-20.04 3.0	54s
ubuntu-20.04 3.1	53s
ubuntu-20.04 3.2	57s
ubuntu-20.04 3.3	58s
ubuntu-20.04 head	55s
ubuntu-20.04 truffleruby	1m 30s
ubuntu-20.04 truffleruby-head	1m 36s
macos-latest 2.7	56s
macos-latest 3.0	40s
macos-latest 3.1	39s
macos-latest 3.2	37s
macos-latest 3.3	40s
macos-latest head	40s
macos-latest truffleruby	55s
macos-latest truffleruby-head	1m 3s
windows-latest 2.7	5m 11s
windows-latest 3.0	3m 56s
windows-latest 3.1	4m 1s
windows-latest 3.2	4m 9s
windows-latest 3.3	5m 47s
windows-latest head	3m 50s
windows-latest ucrt	4m 1s
windows-latest mswin	2m 23s
	1h 23m 51s

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