Intermittent failure in `spdm_crypt_lib_tests`

[steven-bellock]

Related issue: #3393.

[==========] spdm_crypt_lib_tests: Running 1 test(s).
[ RUN      ] libspdm_test_fips
[  ERROR   ] --- status
[   LINE   ] --- /home/runner/work/libspdm/libspdm/unit_test/test_spdm_fips/test_spdm_fips.c:29: error: Failure!
FFDH compute key failed 
[  FAILED  ] libspdm_test_fips
[==========] spdm_crypt_lib_tests: 1 test(s) run.
[  PASSED  ] 0 test(s).
[  FAILED  ] spdm_crypt_lib_tests: 1 test(s), listed below:
[  FAILED  ] libspdm_test_fips

libspdm/library/spdm_crypt_lib/fips/libspdm_selftest_ffdh.c

Lines 79 to 97 in fbb6a05

	result = libspdm_dh_compute_key(dh1, ff_public_key2, ff_public_key2_length,
	ff_key1, &ff_key1_length);
	if (!result || ff_key1_length != 256) {
	LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "FFDH compute key failed \n"));
	libspdm_dh_free(dh1);
	libspdm_dh_free(dh2);
	result = false;
	goto update;
	}
	result = libspdm_dh_compute_key(dh2, ff_public_key1, ff_public_key1_length,
	ff_key2, &ff_key2_length);
	if (!result || ff_key2_length != 256) {
	LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "FFDH compute key failed \n"));
	libspdm_dh_free(dh1);
	libspdm_dh_free(dh2);
	result = false;
	goto update;
	}