rpm packaging

[filimonov]

CPack
https://developpaper.com/cpack-getting-started-guide/

[Enmk]

Expected result: a PR into clickhouse-cpp that would contain a new (or modified) GitHub workflow file that is:

• triggered on release (can be tested in your fork)
• builds clickhouse-cpp on some conservative CentOS version (preferably 7)
• generates rpm packages from built binaries + headers
• uploads binaries to the GitHub

Project is already using CPack, so generating rpms should be preferably done with it (package build target).

Notes for inspiration:

• https://github.com/ClickHouse/clickhouse-odbc/blob/master/.github/workflows/Docker.yml - (overcomplicated) example of building on CentOS 7
• https://github.com/ClickHouse/clickhouse-odbc/blob/master/.github/workflows/Linux.yml#L133 - example of uploading binaries