feat: Add BuildHost option to RPM packages

[onshorechet]

This commit adds the BuildHost option to the RPM specific configurations. If the build host is not provided it will default to os.Hostname() which is the previous behavior. This allows reproduce-able builds when the build environment spans multiple hosts.

[caarlos0]

Just missing the docs update.

Can do that after merge 🙏

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 69.42%. Comparing base (7a6c105) to head (46656b9).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
rpm/rpm.go	50.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #914      +/-   ##
==========================================
+ Coverage   69.40%   69.42%   +0.01%     
==========================================
  Files          22       22              
  Lines        3131     3133       +2     
==========================================
+ Hits         2173     2175       +2     
  Misses        745      745              
  Partials      213      213              

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[onshorechet]

I'm happy to add that before merge. I can rebase it into one commit or leave it as a second, just not sure how you like your git history.

[caarlos0]

@onshorechet ah, thanks

any way is fine, I usually squash and merge

[onshorechet]

I'm guessing the doc's are generated from that configuration.md. I also updated the json schema. Thanks!

[caarlos0]

thank you!