Move from `set_request_parameters` to HttpMixin

The following files still use th set_request_parameters method from intelmq.lib.bot:

intelmq/bots/collectors/shodan/collector_stream.py
intelmq/bots/experts/do_portal/expert.py
intelmq/bots/experts/rdap/expert.py
intelmq/bots/experts/ripe/expert.py
intelmq/bots/experts/tuency/expert.py
intelmq/bots/experts/national_cert_contact_certat/expert.py
intelmq/bots/experts/http/expert_status.py
intelmq/bots/experts/http/expert_content.py
intelmq/bots/experts/splunk_saved_search/expert.py
intelmq/bots/outputs/restapi/output.py
intelmq/bots/outputs/elasticsearch/output.py

If we update those to use the intelmq.lib.mixins.HttpMixin we could finally remove the set_request_parameters method from the bot class.