Move certain "generate" scripts to the framework

[mpg]

Move the following scripts to the framework:

scripts/generate_features.pl
scripts/generate_psa_constants.py
scripts/generate_query_config.pl
programs/test/generate_cpp_dummy_build.sh (to ./scripts as well)

Note: as of writing, generate_features.pl is identical between 3.6 and development, but the other three have minor differences that need resolving.

For generate_psa_constants.py we probably want to use is_mbedtls_3_6() from the build_tree module. (Once the script is in the framework repo, from . import build_tree should work. From the mbedtls repo, I think we want import framework_scripts_path # pylint: disable=unused-import then from mbedtls_framework import build_tree.)

For generate_cpp_dummy_build.sh we probably want to use in_3_6_branch from scripts/project_detection.sh.

For generate_query_config.pl since this a Perl script we don't have a utility function ready, but I guess a good old-fashioned -d tf-psa-crypto should do nicely.