Trim host-id whitespace on Linux

[wathiede]

Changes

On Linux /etc/machine-id has a newline, it's unusual to have newlines in a resource value like host.id, so this change trims the whitespace around the value.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• [N/A] Unit tests added/updated (if applicable)
• [N/A] Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• [N/A] Changes in public API reviewed (if applicable)

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: cijothomas / name: Cijo Thomas (3bdd225)
• ✅ login: wathiede / name: Bill (5e92826)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.1%. Comparing base (30a3f4e) to head (3bdd225).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #141   +/-   ##
=====================================
  Coverage   54.1%   54.1%           
=====================================
  Files         42      42           
  Lines       6275    6276    +1     
=====================================
+ Hits        3400    3401    +1     
  Misses      2875    2875           

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[cijothomas]

Thank you!