Adapt test suites to modified error codes

As the new PKCS v1.5 verification function opaquely compares an expected encoding to the given one, it cannot
distinguish multiple reasons of failure anymore and instead always returns MBEDTLS_ERR_RSA_VERIFY_FAILED. This
necessitates some modifications to the expected return values of some tests verifying signatures with bad padding.
diff --git a/tests/suites/test_suite_pk.data b/tests/suites/test_suite_pk.data
index f6ea378..cfb4281 100644
--- a/tests/suites/test_suite_pk.data
+++ b/tests/suites/test_suite_pk.data
@@ -114,13 +114,13 @@
 depends_on:MBEDTLS_PKCS1_V21:MBEDTLS_SHA256_C
 pk_rsa_verify_ext_test_vec:"54657374206d657373616765":MBEDTLS_MD_SHA256:1024:16:"00dd118a9f99bab068ca2aea3b6a6d5997ed4ec954e40deecea07da01eaae80ec2bb1340db8a128e891324a5c5f5fad8f590d7c8cacbc5fe931dafda1223735279461abaa0572b761631b3a8afe7389b088b63993a0a25ee45d21858bab9931aedd4589a631b37fcf714089f856549f359326dd1e0e86dde52ed66b4a90bda4095":16:"010001":"0d2bdb0456a3d651d5bd48a4204493898f72cf1aaddd71387cc058bc3f4c235ea6be4010fd61b28e1fbb275462b53775c04be9022d38b6a2e0387dddba86a3f8554d2858044a59fddbd594753fc056fe33c8daddb85dc70d164690b1182209ff84824e0be10e35c379f2f378bf176a9f7cb94d95e44d90276a298c8810f741c9":MBEDTLS_PK_RSASSA_PSS:-1:MBEDTLS_RSA_SALT_LEN_ANY:MBEDTLS_ERR_PK_BAD_INPUT_DATA
 
-Verify ext RSA #9 (PKCS1 v2.1, RSA with options)
+Verify ext RSA #9 (PKCS1 v1.5, RSA with options)
 depends_on:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C
 pk_rsa_verify_ext_test_vec:"54657374206d657373616765":MBEDTLS_MD_SHA256:1024:16:"00dd118a9f99bab068ca2aea3b6a6d5997ed4ec954e40deecea07da01eaae80ec2bb1340db8a128e891324a5c5f5fad8f590d7c8cacbc5fe931dafda1223735279461abaa0572b761631b3a8afe7389b088b63993a0a25ee45d21858bab9931aedd4589a631b37fcf714089f856549f359326dd1e0e86dde52ed66b4a90bda4095":16:"010001":"0d2bdb0456a3d651d5bd48a4204493898f72cf1aaddd71387cc058bc3f4c235ea6be4010fd61b28e1fbb275462b53775c04be9022d38b6a2e0387dddba86a3f8554d2858044a59fddbd594753fc056fe33c8daddb85dc70d164690b1182209ff84824e0be10e35c379f2f378bf176a9f7cb94d95e44d90276a298c8810f741c9":MBEDTLS_PK_RSA:MBEDTLS_MD_SHA256:MBEDTLS_RSA_SALT_LEN_ANY:MBEDTLS_ERR_PK_BAD_INPUT_DATA
 
-Verify ext RSA #10 (PKCS1 v2.1, RSA without options)
+Verify ext RSA #10 (PKCS1 v1.5, RSA without options)
 depends_on:MBEDTLS_PKCS1_V15:MBEDTLS_SHA256_C
-pk_rsa_verify_ext_test_vec:"54657374206d657373616765":MBEDTLS_MD_SHA256:1024:16:"00dd118a9f99bab068ca2aea3b6a6d5997ed4ec954e40deecea07da01eaae80ec2bb1340db8a128e891324a5c5f5fad8f590d7c8cacbc5fe931dafda1223735279461abaa0572b761631b3a8afe7389b088b63993a0a25ee45d21858bab9931aedd4589a631b37fcf714089f856549f359326dd1e0e86dde52ed66b4a90bda4095":16:"010001":"0d2bdb0456a3d651d5bd48a4204493898f72cf1aaddd71387cc058bc3f4c235ea6be4010fd61b28e1fbb275462b53775c04be9022d38b6a2e0387dddba86a3f8554d2858044a59fddbd594753fc056fe33c8daddb85dc70d164690b1182209ff84824e0be10e35c379f2f378bf176a9f7cb94d95e44d90276a298c8810f741c9":MBEDTLS_PK_RSA:-1:MBEDTLS_RSA_SALT_LEN_ANY:MBEDTLS_ERR_RSA_INVALID_PADDING
+pk_rsa_verify_ext_test_vec:"54657374206d657373616765":MBEDTLS_MD_SHA256:1024:16:"00dd118a9f99bab068ca2aea3b6a6d5997ed4ec954e40deecea07da01eaae80ec2bb1340db8a128e891324a5c5f5fad8f590d7c8cacbc5fe931dafda1223735279461abaa0572b761631b3a8afe7389b088b63993a0a25ee45d21858bab9931aedd4589a631b37fcf714089f856549f359326dd1e0e86dde52ed66b4a90bda4095":16:"010001":"0d2bdb0456a3d651d5bd48a4204493898f72cf1aaddd71387cc058bc3f4c235ea6be4010fd61b28e1fbb275462b53775c04be9022d38b6a2e0387dddba86a3f8554d2858044a59fddbd594753fc056fe33c8daddb85dc70d164690b1182209ff84824e0be10e35c379f2f378bf176a9f7cb94d95e44d90276a298c8810f741c9":MBEDTLS_PK_RSA:-1:MBEDTLS_RSA_SALT_LEN_ANY:MBEDTLS_ERR_RSA_VERIFY_FAILED
 
 Verify ext RSA #11 (PKCS1 v2.1, asking for ECDSA)
 depends_on:MBEDTLS_ECDSA_C:MBEDTLS_SHA256_C