RHOAIENG-3245: add methods to execute and return queries from trustyai service

[christinaexyou]

addresses RHOAIENG-3245 by making adding the following methods:

• converts json files to pandas dfs and vice versa
• uploads data to service and/or model
• get metric request with the option to schedule for reoccurring intervals
• retrieves metric data from prometheus for specific time interval

demo nb to follow shortly

[christinaexyou]

changes made:

• added separate dependency for server module. upated pyproject.tomll and pyproject.toml to reflect this change
• added tests for df to json conversion and vice versa in tests/extras/test_metrics_service.py
• updated metrics_service.py by enabling SSL verification by default, adding configurable timeout, and raising exceptions

[christinaexyou]

changes made:

• replaced new_client_from_config to load_incluster_config()
• renamed server/server.py to api/api.py
• updated metrics_service.py, pyproject.toml and workflow.yml to reflect name change