Add hardware and OS details to runtime profile

The runtime profiles are currently lacking any details about the hardware the query ran on (CPU model and core count, cache sizes, etc) OS versions, etc which may all be relevant when analyzing performance issues, comparing performance metrics across different profiles, etc.

We should add relevant hardware and OS details to the profile.  The information currently displayed at the root Impalad web UI page (Hardware Info, OS Info) would be a good starting point.

IMPALA-12118 is also relevant if we want to cover ARM processors.