Fingerprint Windows Build Number

[schmichael]

As of Nomad 1.5.1 the Windows version is fingerprinted into 2 attributes, but neither is a useful format:

kernel.version                           = 10.0.14393.5501 Build 14393.5501
...
os.version                               = 10.0.14393.5501 Build 14393.5501

Proposal

Include just the build number as a new fingerprinted attribute like:

os.build = 14393.5501

Such that constraints could treat it like a version number for comparisons.

Use-cases

Nomad 1.5 added the Task API as a unix socket. Windows only added Unix socket support in build 17063. In order to schedule tasks that expect the Task API on a version of Windows with unix socket support, we need to fingerprint the build number distinctly.

[tgross]

Done in #17576 which will ship in Nomad 1.6.0