Changes needed when building with a static libcrypto on Linux

[ashman-p]

Static OQSProvider builds fail when libcrypto is built 'no-shared'.

sample....

cmake -DOPENSSL_ROOT_DIR=/home/ubuntu/openssl3.3/ossl-install/  -DOQS_PROVIDER_BUILD_STATIC=ON -DCMAKE_PREFIX_PATH=/home/ubuntu/openssl3.3/ossl-install/ -DCMAKE_INSTALL_PREFIX=/home/ubuntu/openssl3.3/ossl-install/   -DCMAKE_BUILD_TYPE=Debug  -GNinja -S .. 
5. See error
FAILED: test/oqs_test_groups  : && /usr/bin/cc -g   test/CMakeFiles/oqs_test_groups.dir/oqs_test_groups.c.o test/CMakeFiles/oqs_test_groups.dir/test_common.c.o test/CMakeFiles/oqs_test_groups.dir/tlstest_helpers.c.o  -o test/oqs_test_groups  /home/ubuntu/openssl3.3/ossl-install/lib64/libssl.a  /home/ubuntu/openssl3.3/ossl-install/lib64/libcrypto.a  lib/liboqsprovider.a  /home/ubuntu/openssl3.3/ossl-install/lib/liboqs.a  /home/ubuntu/openssl3.3/ossl-install/lib64/libcrypto.a && : /usr/bin/ld: /home/ubuntu/openssl3.3/ossl-install/lib64/libcrypto.a(libcrypto-lib-threads_pthread.o): in function CRYPTO_THREAD_lock_new':

Fixes #575

[baentsch]

LGTM: Thanks for the improvement! Worthwhile adding a CI test case for such builds as part of this PR?

[baentsch]

LGTM: Thanks for the improvement! Worthwhile adding a CI test case for such builds as part of this PR?

Merging without that then. Created #590 to track this possible improvement.