Move tests for error.c from tf-psa-crypto to Mbed TLS

This commit moves the test functions and test data from tf-psa-crypto to
Mbed TLS.

Signed-off-by: Harry Ramsey <harry.ramsey@arm.com>
diff --git a/tf-psa-crypto/tests/suites/test_suite_error.data b/tests/suites/test_suite_error.data
similarity index 100%
rename from tf-psa-crypto/tests/suites/test_suite_error.data
rename to tests/suites/test_suite_error.data
diff --git a/tf-psa-crypto/tests/suites/test_suite_error.function b/tests/suites/test_suite_error.function
similarity index 100%
rename from tf-psa-crypto/tests/suites/test_suite_error.function
rename to tests/suites/test_suite_error.function