Initial attempt at adding some server context to the client

[Paultagoras]

Summary

Closes #2027
Adds a call to gather currentUser(), timezone(), and version() for the client

Checklist

Delete items not relevant to your PR:

• Closes issue
• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[chernser]

please correct getters

[sonarcloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
85.7% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[mzitnik]

General comment i think we should a way to disable if the user wants