test: properly select MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE value

This value should be:
- OK for all EC/FFDH key pairs/public keys;
- OK for all supported public RSA keys;
- OK for RSA key pairs up to 2048 bits;
- FAIL for RSA key pairs above 2048 bits.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/suites/test_suite_pkwrite.data b/tests/suites/test_suite_pkwrite.data
index 30ccfbc..34b8698 100644
--- a/tests/suites/test_suite_pkwrite.data
+++ b/tests/suites/test_suite_pkwrite.data
@@ -7,11 +7,11 @@
 pk_write_pubkey_check:"../framework/data_files/server1.pubkey.der":TEST_DER
 
 Public key write check RSA 4096
-depends_on:MBEDTLS_RSA_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_PEM_WRITE_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_PEM_WRITE_C:MBEDTLS_TEST_ALLOW_RSA_4096
 pk_write_pubkey_check:"../framework/data_files/rsa4096_pub.pem":TEST_PEM
 
 Public key write check RSA 4096 (DER)
-depends_on:MBEDTLS_RSA_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_TEST_ALLOW_RSA_4096
 pk_write_pubkey_check:"../framework/data_files/rsa4096_pub.der":TEST_DER
 
 Public key write check EC 192 bits
@@ -66,11 +66,11 @@
 pk_write_key_check:"../framework/data_files/server1.key.der":TEST_DER
 
 Private key write check RSA 4096
-depends_on:MBEDTLS_RSA_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_PEM_WRITE_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_PEM_PARSE_C:MBEDTLS_PEM_WRITE_C:MBEDTLS_TEST_ALLOW_RSA_4096
 pk_write_key_check:"../framework/data_files/rsa4096_prv.pem":TEST_PEM
 
 Private key write check RSA 4096 (DER)
-depends_on:MBEDTLS_RSA_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_TEST_ALLOW_RSA_4096
 pk_write_key_check:"../framework/data_files/rsa4096_prv.der":TEST_DER
 
 Private key write check EC 192 bits
@@ -134,7 +134,7 @@
 pk_write_public_from_private:"../framework/data_files/server1.key.der":"../framework/data_files/server1.pubkey.der"
 
 Derive public key RSA 4096
-depends_on:MBEDTLS_RSA_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_TEST_ALLOW_RSA_4096
 pk_write_public_from_private:"../framework/data_files/rsa4096_prv.der":"../framework/data_files/rsa4096_pub.der"
 
 Derive public key EC 192 bits