Handle tls and dtls server version selection similarly #79

Job	Run time
check_docs	1m 2s
basic_clang	5m 6s
basic_gcc	5m 4s
check_update	1m 13s
check-ansi	2m 42s
minimal	2m 12s
no-deprecated	4m 38s
no-shared (ubuntu-latest)	3m 41s
no-shared (macos-latest)	4m 30s
address_ub_sanitizer	9m 20s
enable_non-default_options	4m 10s
memory_sanitizer	18m 53s
non-caching	13m 15s
threads_sanitizer	5m 11s
buildtest	6m 22s
enable_brotli_and_asan_ubsan	8m 40s
enable_brotli_and_zstd_dynamic	4m 50s
enable_brotli_dynamic	4m 35s
enable_zstd_and_asan_ubsan	8m 38s
enable_zstd_dynamic	4m 48s
enable-tfo (ubuntu-latest)	1s
fips_and_ktls	5m 2s
enable-tfo (macos-latest)	10m 37s
legacy	3m 51s
no-legacy	5m 1s
external-test-cf-quiche	6m 39s
external-test-pyca (1.51.0, 3.9)	6m 9s
external-tests	11m 0s
out-of-source-and-install (ubuntu-latest)	1s
out-of-source-and-install (macos-latest)	6m 59s
	2h 54m 10s

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