Add sig algos and key agreements to bench.py

[securitykernel]

Extends bench.py in order to be ready to run comparative benchmarks against OpenSSL to be published.

• From the already supported algorithms, remove MD5 and RIPEMD and add SHA-3 instead
• Add signature algorithms, in particular RSA and ECDSA (more can be added easily)
• Add key agreements, in particular DH and ECDH (more can be added easily)

Tested successfully with OpenSSL 3.0 and 3.2. OpenSSL seems to have changed their machine-readable output format in between these versions, which forced us to make the regexs more flexible.

Also changed the DH groups used in botan speed dh from modp to ffdhe, because the latter is used by openssl speed. Had to remove some key sizes not supported by the FFDHE groups.

bench.py now also supports optionally specifying one or more algorithms to benchmark instead of benchmarking all algorithms from the internal lists:

src/scripts/bench.py # still the default: benchmark all algorithms
src/scripts/bench.py RSA # NEW: benchmark only RSA
src/scripts/bench.py RSA ECDSA AES-128/GCM # NEW: benchmark RSA, ECDSA and AES-128/GCM

[randombit]

Thanks

[coveralls]

coverage: 92.069% (+0.003%) from 92.066%
when pulling 7bd651a on sk/more-benchmarks
into 2bcccc8 on master.