fix(certificate_builder): Add ssl factory entrypoint for cqlshrc

[k0machi]

This commit allows scylla-doctor to use correct certificates when
checking CQLsh liveliness.

Fixes #10490

Testing

• Jenkins/UbuntuFIPS

PR pre-checks (self review)

• I added the relevant backport labels
• I didn't leave commented-out/debugging code

Reminders

• Add New configuration option and document them (in sdcm/sct_config.py)
• Add unit tests to cover my changes (under unit-test/ folder)
• Update the Readme/doc folder relevant to this change (if needed)

[fruch]

@k0machi

17:04:19    File "/tmp/jenkins/workspace/scylla-staging/alexey/artifacts-ubuntu2004-fips-test/scylla-cluster-tests/sdcm/provision/scylla_yaml/certificate_builder.py", line 37, in update_cqlshrc
17:04:19      config['connection']['ssl'] = True
17:04:19    File "/usr/local/lib/python3.10/configparser.py", line 1263, in __setitem__
17:04:19      self._parser._validate_value_types(option=key, value=value)
17:04:19    File "/usr/local/lib/python3.10/configparser.py", line 1190, in _validate_value_types
17:04:19      raise TypeError("option values must be strings")
17:04:19  TypeError: option values must be strings

[soyacz]

still test failed - is it related to this one?

[fruch]

still test failed - is it related to this one?

yes, scylla-doctor still fails to run cqlsh

[k0machi]

still test failed - is it related to this one?

yes, scylla-doctor still fails to run cqlsh

I'll check the generated config - maybe something is wrong there.