generate_test_keys: use keys from asymmetric_key_data.py

asymmetric_key_data.py already provides EC/RSA key pair values that
are suitable for generate_test_keys.py. So instead of re-generating
the keys using gen_key program, we use those keys.

This commit also:
- extends asymmetric_key_data.py to introduce
RSA bit sizes that are used in test_suite_pk but were missing from
asymmetric_key_data.py.
- updates test_keys.h with new keys.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>

tests/scripts/check-python-files.sh

@@ -62,6 +62,7 @@ $PYTHON -m pylint scripts/mbedtls_dev/*.py scripts/*.py tests/scripts/*.py || {
 
 echo
 echo 'Running mypy ...'
+export MYPYPATH="../../scripts"
 $PYTHON -m mypy scripts/*.py tests/scripts/*.py ||
   ret=1